20145404694775 has 12 divisors (see below), whose sum is σ = 26449731340992. Its totient is φ = 15168304711040.

The previous prime is 20145404694731. The next prime is 20145404694787. The reversal of 20145404694775 is 57749640454102.

It is not a de Polignac number, because 20145404694775 - 2²⁹ = 20144867823863 is a prime.

It is a super-2 number, since 2×20145404694775² (a number of 27 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 23700475687 + ... + 23700476536.

It is an arithmetic number, because the mean of its divisors is an integer number (2204144278416).

Almost surely, 2^{20145404694775} is an apocalyptic number.

20145404694775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20145404694775 is a deficient number, since it is larger than the sum of its proper divisors (6304326646217).

20145404694775 is a wasteful number, since it uses less digits than its factorization.

20145404694775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47400952250 (or 47400952245 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 58.

The spelling of 20145404694775 in words is "twenty trillion, one hundred forty-five billion, four hundred four million, six hundred ninety-four thousand, seven hundred seventy-five".