20586111972 has 24 divisors (see below), whose sum is σ = 49205829792. Its totient is φ = 6694670400.

The previous prime is 20586111961. The next prime is 20586111977. The reversal of 20586111972 is 27911168502.

It is a super-2 number, since 2×20586111972² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20586111977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20920354 + ... + 20921337.

It is an arithmetic number, because the mean of its divisors is an integer number (2050242908).

Almost surely, 2^20586111972 is an apocalyptic number.

It is an amenable number.

20586111972 is an abundant number, since it is smaller than the sum of its proper divisors (28619717820).

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

20586111972 is a wasteful number, since it uses less digits than its factorization.

20586111972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41841739 (or 41841737 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 20586111972 in words is "twenty billion, five hundred eighty-six million, one hundred eleven thousand, nine hundred seventy-two".