20655290604 has 96 divisors (see below), whose sum is σ = 52369569280. Its totient is φ = 6298560000.

The previous prime is 20655290603. The next prime is 20655290641. The reversal of 20655290604 is 40609255602.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20655290603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14156427 + ... + 14157885.

Almost surely, 2^20655290604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20655290604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26184784640).

20655290604 is an abundant number, since it is smaller than the sum of its proper divisors (31714278676).

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

20655290604 is a wasteful number, since it uses less digits than its factorization.

20655290604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20655290604 in words is "twenty billion, six hundred fifty-five million, two hundred ninety thousand, six hundred four".