21150354051 has 48 divisors (see below), whose sum is σ = 32992727040. Its totient is φ = 13014172800.

The previous prime is 21150354023. The next prime is 21150354061. The reversal of 21150354051 is 15045305112.

21150354051 is a `hidden beast` number, since 2 + 115 + 0 + 3 + 540 + 5 + 1 = 666.

It is not a de Polignac number, because 21150354051 - 2¹⁷ = 21150222979 is a prime.

It is a super-2 number, since 2×21150354051² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21150354061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1786351 + ... + 1798151.

It is an arithmetic number, because the mean of its divisors is an integer number (687348480).

Almost surely, 2^21150354051 is an apocalyptic number.

21150354051 is a deficient number, since it is larger than the sum of its proper divisors (11842372989).

21150354051 is a wasteful number, since it uses less digits than its factorization.

21150354051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12096 (or 12093 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 21150354051 its reverse (15045305112), we get a palindrome (36195659163).

The spelling of 21150354051 in words is "twenty-one billion, one hundred fifty million, three hundred fifty-four thousand, fifty-one".