20201964 has 12 divisors (see below), whose sum is σ = 47137944. Its totient is φ = 6733984.

The previous prime is 20201939. The next prime is 20201969. The reversal of 20201964 is 46910202.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20201969) 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 3 ways as a sum of consecutive naturals, for example, 841737 + ... + 841760.

It is an arithmetic number, because the mean of its divisors is an integer number (3928162).

Almost surely, 2^20201964 is an apocalyptic number.

It is an amenable number.

20201964 is an abundant number, since it is smaller than the sum of its proper divisors (26935980).

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

20201964 is a wasteful number, since it uses less digits than its factorization.

20201964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683504 (or 1683502 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20201964 is about 4494.6594976705. The cubic root of 20201964 is about 272.3523943192.

The spelling of 20201964 in words is "twenty million, two hundred one thousand, nine hundred sixty-four".