21200540151 has 16 divisors (see below), whose sum is σ = 32853139200. Its totient is φ = 11909261568.

The previous prime is 21200540143. The next prime is 21200540189. The reversal of 21200540151 is 15104500212.

It is not a de Polignac number, because 21200540151 - 2³ = 21200540143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200540111) 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, 8554266 + ... + 8556743.

It is an arithmetic number, because the mean of its divisors is an integer number (2053321200).

Almost surely, 2^21200540151 is an apocalyptic number.

21200540151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21200540151 is a deficient number, since it is larger than the sum of its proper divisors (11652599049).

21200540151 is a wasteful number, since it uses less digits than its factorization.

21200540151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17111078.

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 21200540151 in words is "twenty-one billion, two hundred million, five hundred forty thousand, one hundred fifty-one".