20462980 has 24 divisors (see below), whose sum is σ = 44455320. Its totient is φ = 7902720.

The previous prime is 20462933. The next prime is 20462983. The reversal of 20462980 is 8926402.

It can be written as a sum of positive squares in 4 ways, for example, as 553536 + 19909444 = 744^2 + 4462^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20462983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17061 + ... + 18220.

It is an arithmetic number, because the mean of its divisors is an integer number (1852305).

Almost surely, 2^20462980 is an apocalyptic number.

20462980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20462980 is an abundant number, since it is smaller than the sum of its proper divisors (23992340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20462980 is a wasteful number, since it uses less digits than its factorization.

20462980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35319 (or 35317 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20462980 is about 4523.6025466435. The cubic root of 20462980 is about 273.5203393417.

The spelling of 20462980 in words is "twenty million, four hundred sixty-two thousand, nine hundred eighty".