21232431010 has 32 divisors (see below), whose sum is σ = 46247448960. Its totient is φ = 6851473152.

The previous prime is 21232431001. The next prime is 21232431037. The reversal of 21232431010 is 1013423212.

It is a happy number.

It is a super-3 number, since 3×21232431010³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8920000 + ... + 8922379.

It is an arithmetic number, because the mean of its divisors is an integer number (1445232780).

Almost surely, 2^21232431010 is an apocalyptic number.

21232431010 is an abundant number, since it is smaller than the sum of its proper divisors (25015017950).

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

21232431010 is a wasteful number, since it uses less digits than its factorization.

21232431010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17842410.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21232431010 its reverse (1013423212), we get a palindrome (22245854222).

The spelling of 21232431010 in words is "twenty-one billion, two hundred thirty-two million, four hundred thirty-one thousand, ten".