20125720736135 has 48 divisors (see below), whose sum is σ = 29832170184864. Its totient is φ = 12951268098048.

The previous prime is 20125720736063. The next prime is 20125720736141. The reversal of 20125720736135 is 53163702752102.

It is not a de Polignac number, because 20125720736135 - 2⁴² = 15727674225031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5517434 + ... + 8407943.

It is an arithmetic number, because the mean of its divisors is an integer number (621503545518).

Almost surely, 2^{20125720736135} is an apocalyptic number.

20125720736135 is a deficient number, since it is larger than the sum of its proper divisors (9706449448729).

20125720736135 is a wasteful number, since it uses less digits than its factorization.

20125720736135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13925760 (or 13925753 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 20125720736135 in words is "twenty trillion, one hundred twenty-five billion, seven hundred twenty million, seven hundred thirty-six thousand, one hundred thirty-five".