20120975424 has 168 divisors, whose sum is σ = 65246938848. Its totient is φ = 6097213440.

The previous prime is 20120975419. The next prime is 20120975449. The reversal of 20120975424 is 42457902102.

20120975424 is a `hidden beast` number, since 2 + 0 + 1 + 20 + 97 + 542 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112264 + ... + 229880.

It is an arithmetic number, because the mean of its divisors is an integer number (388374636).

Almost surely, 2^20120975424 is an apocalyptic number.

20120975424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120975424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32623469424).

20120975424 is an abundant number, since it is smaller than the sum of its proper divisors (45125963424).

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

20120975424 is a wasteful number, since it uses less digits than its factorization.

20120975424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117655 (or 117633 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 20120975424 in words is "twenty billion, one hundred twenty million, nine hundred seventy-five thousand, four hundred twenty-four".