20756775365401 has 16 divisors (see below), whose sum is σ = 21554884995840. Its totient is φ = 19964177775360.

The previous prime is 20756775365399. The next prime is 20756775365407. The reversal of 20756775365401 is 10456357765702.

It is a cyclic number.

It is not a de Polignac number, because 20756775365401 - 2¹ = 20756775365399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20756775365407) 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, 55037265 + ... + 55413121.

It is an arithmetic number, because the mean of its divisors is an integer number (1347180312240).

Almost surely, 2^{20756775365401} is an apocalyptic number.

It is an amenable number.

20756775365401 is a deficient number, since it is larger than the sum of its proper divisors (798109630439).

20756775365401 is a wasteful number, since it uses less digits than its factorization.

20756775365401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383184.

The product of its (nonzero) digits is 37044000, while the sum is 58.

The spelling of 20756775365401 in words is "twenty trillion, seven hundred fifty-six billion, seven hundred seventy-five million, three hundred sixty-five thousand, four hundred one".