20041251555 has 32 divisors (see below), whose sum is σ = 34548204096. Its totient is φ = 9862009344.

The previous prime is 20041251553. The next prime is 20041251563. The reversal of 20041251555 is 55515214002.

It is not a de Polignac number, because 20041251555 - 2¹ = 20041251553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20041251553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432909 + ... + 476961.

It is an arithmetic number, because the mean of its divisors is an integer number (1079631378).

Almost surely, 2^20041251555 is an apocalyptic number.

20041251555 is a deficient number, since it is larger than the sum of its proper divisors (14506952541).

20041251555 is a wasteful number, since it uses less digits than its factorization.

20041251555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46407.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 20041251555 its reverse (55515214002), we get a palindrome (75556465557).

The spelling of 20041251555 in words is "twenty billion, forty-one million, two hundred fifty-one thousand, five hundred fifty-five".