21430511300 has 36 divisors (see below), whose sum is σ = 50731867536. Its totient is φ = 7792912800.

The previous prime is 21430511281. The next prime is 21430511317. The reversal of 21430511300 is 311503412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9740042 + ... + 9742241.

Almost surely, 2^21430511300 is an apocalyptic number.

21430511300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21430511300 is an abundant number, since it is smaller than the sum of its proper divisors (29301356236).

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

21430511300 is a wasteful number, since it uses less digits than its factorization.

21430511300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19482308 (or 19482301 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 21430511300 in words is "twenty-one billion, four hundred thirty million, five hundred eleven thousand, three hundred".