21900153250 has 16 divisors (see below), whose sum is σ = 40997087352. Its totient is φ = 8760061200.

The previous prime is 21900153211. The next prime is 21900153251. The reversal of 21900153250 is 5235100912.

It can be written as a sum of positive squares in 4 ways, for example, as 2844835569 + 19055317681 = 53337^2 + 138041^2 .

It is not an unprimeable number, because it can be changed into a prime (21900153251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43800057 + ... + 43800556.

Almost surely, 2^21900153250 is an apocalyptic number.

21900153250 is a deficient number, since it is larger than the sum of its proper divisors (19096934102).

21900153250 is an equidigital number, since it uses as much as digits as its factorization.

21900153250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87600630 (or 87600620 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 21900153250 in words is "twenty-one billion, nine hundred million, one hundred fifty-three thousand, two hundred fifty".