21431154010 has 24 divisors (see below), whose sum is σ = 44874213300. Its totient is φ = 7347824064.

The previous prime is 21431154007. The next prime is 21431154029. The reversal of 21431154010 is 1045113412.

It can be written as a sum of positive squares in 2 ways, for example, as 19743341121 + 1687812889 = 140511^2 + 41083^2 .

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, 21868035 + ... + 21869014.

Almost surely, 2^21431154010 is an apocalyptic number.

21431154010 is an abundant number, since it is smaller than the sum of its proper divisors (23443059290).

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

21431154010 is a wasteful number, since it uses less digits than its factorization.

21431154010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43737070 (or 43737063 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21431154010 its reverse (1045113412), we get a palindrome (22476267422).

The spelling of 21431154010 in words is "twenty-one billion, four hundred thirty-one million, one hundred fifty-four thousand, ten".