21554400150 has 36 divisors (see below), whose sum is σ = 57909489612. Its totient is φ = 5747839920.

The previous prime is 21554400149. The next prime is 21554400199. The reversal of 21554400150 is 5100445512.

21554400150 is a `hidden beast` number, since 21 + 55 + 440 + 0 + 150 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23948884 + ... + 23949783.

Almost surely, 2^21554400150 is an apocalyptic number.

21554400150 is an abundant number, since it is smaller than the sum of its proper divisors (36355089462).

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

21554400150 is a wasteful number, since it uses less digits than its factorization.

21554400150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47898685 (or 47898677 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 21554400150 its reverse (5100445512), we get a palindrome (26654845662).

The spelling of 21554400150 in words is "twenty-one billion, five hundred fifty-four million, four hundred thousand, one hundred fifty".