20154161005 has 16 divisors (see below), whose sum is σ = 26391230784. Its totient is φ = 14653348480.

The previous prime is 20154161003. The next prime is 20154161021. The reversal of 20154161005 is 50016145102.

It is a happy number.

It is not a de Polignac number, because 20154161005 - 2¹ = 20154161003 is a prime.

It is a super-2 number, since 2×20154161005² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154161003) 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, 146622 + ... + 248608.

It is an arithmetic number, because the mean of its divisors is an integer number (1649451924).

Almost surely, 2^20154161005 is an apocalyptic number.

It is an amenable number.

20154161005 is a deficient number, since it is larger than the sum of its proper divisors (6237069779).

20154161005 is a wasteful number, since it uses less digits than its factorization.

20154161005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105596.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 20154161005 in words is "twenty billion, one hundred fifty-four million, one hundred sixty-one thousand, five".