20688464124 has 48 divisors (see below), whose sum is σ = 54138067200. Its totient is φ = 6831700848.

The previous prime is 20688464099. The next prime is 20688464129. The reversal of 20688464124 is 42146488602.

20688464124 is a `hidden beast` number, since 2 + 0 + 68 + 8 + 464 + 124 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20688464124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20688464129) 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, 883584 + ... + 906695.

It is an arithmetic number, because the mean of its divisors is an integer number (1127876400).

Almost surely, 2^20688464124 is an apocalyptic number.

It is an amenable number.

20688464124 is an abundant number, since it is smaller than the sum of its proper divisors (33449603076).

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

20688464124 is a wasteful number, since it uses less digits than its factorization.

20688464124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790399 (or 1790391 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 20688464124 in words is "twenty billion, six hundred eighty-eight million, four hundred sixty-four thousand, one hundred twenty-four".