20551276386 has 12 divisors (see below), whose sum is σ = 44527765542. Its totient is φ = 6850425456.

The previous prime is 20551276379. The next prime is 20551276409. The reversal of 20551276386 is 68367215502.

20551276386 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 1 + 2 + 7 + 638 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19773703161 + 777573225 = 140619^2 + 27885^2 .

It is a super-2 number, since 2×20551276386² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570868771 + ... + 570868806.

Almost surely, 2^20551276386 is an apocalyptic number.

20551276386 is an abundant number, since it is smaller than the sum of its proper divisors (23976489156).

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

20551276386 is a wasteful number, since it uses less digits than its factorization.

20551276386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141737585 (or 1141737582 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 20551276386 in words is "twenty billion, five hundred fifty-one million, two hundred seventy-six thousand, three hundred eighty-six".