20702955672 has 128 divisors (see below), whose sum is σ = 66104409600. Its totient is φ = 5880864384.

The previous prime is 20702955629. The next prime is 20702955697. The reversal of 20702955672 is 27655920702.

20702955672 is a `hidden beast` number, since 2 + 0 + 7 + 0 + 29 + 556 + 72 = 666.

It is a super-2 number, since 2×20702955672² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222003 + ... + 301149.

It is an arithmetic number, because the mean of its divisors is an integer number (516440700).

Almost surely, 2^20702955672 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 20702955672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33052204800).

20702955672 is an abundant number, since it is smaller than the sum of its proper divisors (45401453928).

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

20702955672 is a wasteful number, since it uses less digits than its factorization.

20702955672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79342 (or 79332 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 20702955672 in words is "twenty billion, seven hundred two million, nine hundred fifty-five thousand, six hundred seventy-two".