21432523100 has 36 divisors (see below), whose sum is σ = 46610443824. Its totient is φ = 8554231680.

The previous prime is 21432523081. The next prime is 21432523117. The reversal of 21432523100 is 132523412.

It is a super-2 number, since 2×21432523100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 188792 + ... + 280191.

Almost surely, 2^21432523100 is an apocalyptic number.

21432523100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21432523100 is an abundant number, since it is smaller than the sum of its proper divisors (25177920724).

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

21432523100 is a wasteful number, since it uses less digits than its factorization.

21432523100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469454 (or 469447 counting only the distinct ones).

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

The spelling of 21432523100 in words is "twenty-one billion, four hundred thirty-two million, five hundred twenty-three thousand, one hundred".