21232412490 has 16 divisors (see below), whose sum is σ = 50957790048. Its totient is φ = 5661976656.

The previous prime is 21232412489. The next prime is 21232412503. The reversal of 21232412490 is 9421423212.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 707747083 = 21232412490 / (2 + 1 + 2 + 3 + 2 + 4 + 1 + 2 + 4 + 9 + 0).

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, 353873512 + ... + 353873571.

It is an arithmetic number, because the mean of its divisors is an integer number (3184861878).

Almost surely, 2^21232412490 is an apocalyptic number.

21232412490 is an abundant number, since it is smaller than the sum of its proper divisors (29725377558).

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

21232412490 is a wasteful number, since it uses less digits than its factorization.

21232412490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707747093.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 21232412490 in words is "twenty-one billion, two hundred thirty-two million, four hundred twelve thousand, four hundred ninety".