20759620 has 48 divisors (see below), whose sum is σ = 50480640. Its totient is φ = 7023744.

The previous prime is 20759617. The next prime is 20759633. The reversal of 20759620 is 2695702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10122 + ... + 11998.

It is an arithmetic number, because the mean of its divisors is an integer number (1051680).

Almost surely, 2^20759620 is an apocalyptic number.

20759620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20759620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25240320).

20759620 is an abundant number, since it is smaller than the sum of its proper divisors (29721020).

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

20759620 is a wasteful number, since it uses less digits than its factorization.

20759620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972 (or 1970 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20759620 is about 4556.2725993953. The cubic root of 20759620 is about 274.8356924824.

The spelling of 20759620 in words is "twenty million, seven hundred fifty-nine thousand, six hundred twenty".