20720567610 has 64 divisors (see below), whose sum is σ = 58163011200. Its totient is φ = 5234668416.

The previous prime is 20720567587. The next prime is 20720567611. The reversal of 20720567610 is 1676502702.

20720567610 is a `hidden beast` number, since 20 + 72 + 0 + 567 + 6 + 1 + 0 = 666.

It is a super-2 number, since 2×20720567610² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20720567611) 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, 2014419 + ... + 2024678.

It is an arithmetic number, because the mean of its divisors is an integer number (908797050).

Almost surely, 2^20720567610 is an apocalyptic number.

20720567610 is an abundant number, since it is smaller than the sum of its proper divisors (37442443590).

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

20720567610 is a wasteful number, since it uses less digits than its factorization.

20720567610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039132 (or 4039126 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 20720567610 in words is "twenty billion, seven hundred twenty million, five hundred sixty-seven thousand, six hundred ten".