21431229235300 has 18 divisors (see below), whose sum is σ = 46505767440818. Its totient is φ = 8572491694080.

The previous prime is 21431229235291. The next prime is 21431229235411. The reversal of 21431229235300 is 353292213412.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4618785546496 + 16812443688804 = 2149136^2 + 4100298^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21431229235300.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107156146077 + ... + 107156146276.

Almost surely, 2^{21431229235300} is an apocalyptic number.

21431229235300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21431229235300 is an abundant number, since it is smaller than the sum of its proper divisors (25074538205518).

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

21431229235300 is a wasteful number, since it uses less digits than its factorization.

21431229235300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214312292367 (or 214312292360 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 21431229235300 in words is "twenty-one trillion, four hundred thirty-one billion, two hundred twenty-nine million, two hundred thirty-five thousand, three hundred".