21520014150 has 48 divisors (see below), whose sum is σ = 53723132928. Its totient is φ = 5700660000.

The previous prime is 21520014119. The next prime is 21520014151. The reversal of 21520014150 is 5141002512.

It is a super-2 number, since 2×21520014150² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21520014151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452406 + ... + 497705.

It is an arithmetic number, because the mean of its divisors is an integer number (1119231936).

Almost surely, 2^21520014150 is an apocalyptic number.

21520014150 is an abundant number, since it is smaller than the sum of its proper divisors (32203118778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21520014150 is a wasteful number, since it uses less digits than its factorization.

21520014150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950277 (or 950272 counting only the distinct ones).

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

Adding to 21520014150 its reverse (5141002512), we get a palindrome (26661016662).

The spelling of 21520014150 in words is "twenty-one billion, five hundred twenty million, fourteen thousand, one hundred fifty".