20427504690 has 32 divisors (see below), whose sum is σ = 49132391616. Its totient is φ = 5435514560.

The previous prime is 20427504689. The next prime is 20427504697. The reversal of 20427504690 is 9640572402.

It is a super-2 number, since 2×20427504690² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20427504697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724692 + ... + 752351.

It is an arithmetic number, because the mean of its divisors is an integer number (1535387238).

Almost surely, 2^20427504690 is an apocalyptic number.

20427504690 is an abundant number, since it is smaller than the sum of its proper divisors (28704886926).

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

20427504690 is a wasteful number, since it uses less digits than its factorization.

20427504690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477514.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 20427504690 in words is "twenty billion, four hundred twenty-seven million, five hundred four thousand, six hundred ninety".