20378185016255 has 64 divisors (see below), whose sum is σ = 27922445991936. Its totient is φ = 14132554128000.

The previous prime is 20378185016201. The next prime is 20378185016263. The reversal of 20378185016255 is 55261058187302.

It is not a de Polignac number, because 20378185016255 - 2²² = 20378180821951 is a prime.

It is a super-2 number, since 2×20378185016255² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20378185016197 and 20378185016206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 615508412 + ... + 615541518.

It is an arithmetic number, because the mean of its divisors is an integer number (436288218624).

Almost surely, 2^{20378185016255} is an apocalyptic number.

20378185016255 is a deficient number, since it is larger than the sum of its proper divisors (7544260975681).

20378185016255 is a wasteful number, since it uses less digits than its factorization.

20378185016255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34628.

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 20378185016255 in words is "twenty trillion, three hundred seventy-eight billion, one hundred eighty-five million, sixteen thousand, two hundred fifty-five".