21433230210 has 64 divisors (see below), whose sum is σ = 59897532672. Its totient is φ = 4806587136.

The previous prime is 21433230209. The next prime is 21433230211. The reversal of 21433230210 is 1203233412.

It is an interprime number because it is at equal distance from previous prime (21433230209) and next prime (21433230211).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21433230211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 951729 + ... + 973988.

It is an arithmetic number, because the mean of its divisors is an integer number (935898948).

Almost surely, 2^21433230210 is an apocalyptic number.

21433230210 is an abundant number, since it is smaller than the sum of its proper divisors (38464302462).

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

21433230210 is a wasteful number, since it uses less digits than its factorization.

21433230210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925787.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21433230210 its reverse (1203233412), we get a palindrome (22636463622).

The spelling of 21433230210 in words is "twenty-one billion, four hundred thirty-three million, two hundred thirty thousand, two hundred ten".