20112552540 has 72 divisors (see below), whose sum is σ = 62426892528. Its totient is φ = 5238616320.

The previous prime is 20112552461. The next prime is 20112552553. The reversal of 20112552540 is 4525521102.

20112552540 is a `hidden beast` number, since 2 + 0 + 112 + 5 + 5 + 2 + 540 = 666.

It is a congruent number.

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, 1291521 + ... + 1307000.

It is an arithmetic number, because the mean of its divisors is an integer number (867040174).

Almost surely, 2^20112552540 is an apocalyptic number.

20112552540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112552540 is an abundant number, since it is smaller than the sum of its proper divisors (42314339988).

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

20112552540 is a wasteful number, since it uses less digits than its factorization.

20112552540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598579 (or 2598574 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 20112552540 in words is "twenty billion, one hundred twelve million, five hundred fifty-two thousand, five hundred forty".