21554525150 has 48 divisors (see below), whose sum is σ = 40261333824. Its totient is φ = 8585364480.

The previous prime is 21554525149. The next prime is 21554525183. The reversal of 21554525150 is 5152545512.

It is a self number, because there is not a number n which added to its sum of digits gives 21554525150.

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, 22061462 + ... + 22062438.

It is an arithmetic number, because the mean of its divisors is an integer number (838777788).

Almost surely, 2^21554525150 is an apocalyptic number.

21554525150 is a deficient number, since it is larger than the sum of its proper divisors (18706808674).

21554525150 is a wasteful number, since it uses less digits than its factorization.

21554525150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405 (or 2400 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 21554525150 in words is "twenty-one billion, five hundred fifty-four million, five hundred twenty-five thousand, one hundred fifty".