20971552602 has 64 divisors (see below), whose sum is σ = 56315234304. Its totient is φ = 5028143040.

The previous prime is 20971552601. The next prime is 20971552619. The reversal of 20971552602 is 20625517902.

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 (20971552601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1739878 + ... + 1751889.

It is an arithmetic number, because the mean of its divisors is an integer number (879925536).

Almost surely, 2^20971552602 is an apocalyptic number.

20971552602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20971552602 is an abundant number, since it is smaller than the sum of its proper divisors (35343681702).

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

20971552602 is a wasteful number, since it uses less digits than its factorization.

20971552602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491803.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 20971552602 in words is "twenty billion, nine hundred seventy-one million, five hundred fifty-two thousand, six hundred two".