21026250320 has 40 divisors (see below), whose sum is σ = 48950751624. Its totient is φ = 8399365632.

The previous prime is 21026250319. The next prime is 21026250353. The reversal of 21026250320 is 2305262012.

It can be written as a sum of positive squares in 4 ways, for example, as 3222151696 + 17804098624 = 56764^2 + 133432^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×21026250320³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113039 + ... + 234158.

Almost surely, 2^21026250320 is an apocalyptic number.

21026250320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21026250320 is an abundant number, since it is smaller than the sum of its proper divisors (27924501304).

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

21026250320 is a wasteful number, since it uses less digits than its factorization.

21026250320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347967 (or 347961 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The spelling of 21026250320 in words is "twenty-one billion, twenty-six million, two hundred fifty thousand, three hundred twenty".