20425123464 has 32 divisors (see below), whose sum is σ = 52026261120. Its totient is φ = 6679914176.

The previous prime is 20425123457. The next prime is 20425123483. The reversal of 20425123464 is 46432152402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8027472 + ... + 8030015.

It is an arithmetic number, because the mean of its divisors is an integer number (1625820660).

Almost surely, 2^20425123464 is an apocalyptic number.

20425123464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20425123464 is an abundant number, since it is smaller than the sum of its proper divisors (31601137656).

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

20425123464 is a wasteful number, since it uses less digits than its factorization.

20425123464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16057549 (or 16057545 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 20425123464 its reverse (46432152402), we get a palindrome (66857275866).

The spelling of 20425123464 in words is "twenty billion, four hundred twenty-five million, one hundred twenty-three thousand, four hundred sixty-four".