21431641462 has 48 divisors (see below), whose sum is σ = 40935503952. Its totient is φ = 8321369280.

The previous prime is 21431641423. The next prime is 21431641471. The reversal of 21431641462 is 26414613412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281928 + ... + 349780.

It is an arithmetic number, because the mean of its divisors is an integer number (852822999).

Almost surely, 2^21431641462 is an apocalyptic number.

21431641462 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21431641462 is a deficient number, since it is larger than the sum of its proper divisors (19503862490).

21431641462 is a wasteful number, since it uses less digits than its factorization.

21431641462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68173 (or 68166 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The spelling of 21431641462 in words is "twenty-one billion, four hundred thirty-one million, six hundred forty-one thousand, four hundred sixty-two".