20861269722 has 24 divisors (see below), whose sum is σ = 45359144064. Its totient is φ = 6929183304.

The previous prime is 20861269679. The next prime is 20861269757. The reversal of 20861269722 is 22796216802.

20861269722 is a `hidden beast` number, since 2 + 0 + 8 + 612 + 6 + 9 + 7 + 22 = 666.

20861269722 is nontrivially palindromic in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2042538 + ... + 2052725.

It is an arithmetic number, because the mean of its divisors is an integer number (1889964336).

Almost surely, 2^20861269722 is an apocalyptic number.

20861269722 is an abundant number, since it is smaller than the sum of its proper divisors (24497874342).

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

20861269722 is a wasteful number, since it uses less digits than its factorization.

20861269722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095554 (or 4095551 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 20861269722 in words is "twenty billion, eight hundred sixty-one million, two hundred sixty-nine thousand, seven hundred twenty-two".