20427124668 has 24 divisors (see below), whose sum is σ = 48471144960. Its totient is φ = 6693633840.

The previous prime is 20427124667. The next prime is 20427124681. The reversal of 20427124668 is 86642172402.

It is a happy number.

It is a super-2 number, since 2×20427124668² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20427124667) 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, 14425228 + ... + 14426643.

It is an arithmetic number, because the mean of its divisors is an integer number (2019631040).

Almost surely, 2^20427124668 is an apocalyptic number.

It is an amenable number.

20427124668 is an abundant number, since it is smaller than the sum of its proper divisors (28044020292).

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

20427124668 is a wasteful number, since it uses less digits than its factorization.

20427124668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28851937 (or 28851935 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 20427124668 in words is "twenty billion, four hundred twenty-seven million, one hundred twenty-four thousand, six hundred sixty-eight".