21252354150 has 48 divisors (see below), whose sum is σ = 54130334544. Its totient is φ = 5514122880.

The previous prime is 21252354121. The next prime is 21252354163. The reversal of 21252354150 is 5145325212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1909077 + ... + 1920176.

It is an arithmetic number, because the mean of its divisors is an integer number (1127715303).

Almost surely, 2^21252354150 is an apocalyptic number.

21252354150 is an abundant number, since it is smaller than the sum of its proper divisors (32877980394).

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

21252354150 is a wasteful number, since it uses less digits than its factorization.

21252354150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829305 (or 3829300 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 21252354150 its reverse (5145325212), we get a palindrome (26397679362).

The spelling of 21252354150 in words is "twenty-one billion, two hundred fifty-two million, three hundred fifty-four thousand, one hundred fifty".