21246460641 has 12 divisors (see below), whose sum is σ = 35073522432. Its totient is φ = 12140834616.

The previous prime is 21246460619. The next prime is 21246460663. The reversal of 21246460641 is 14606464212.

21246460641 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 6 + 4 + 6 + 0 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (21246460619) and next prime (21246460663).

It is not a de Polignac number, because 21246460641 - 2⁷ = 21246460513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21246460596 and 21246460605.

It is not an unprimeable number, because it can be changed into a prime (21246460241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168622641 + ... + 168622766.

It is an arithmetic number, because the mean of its divisors is an integer number (2922793536).

Almost surely, 2^21246460641 is an apocalyptic number.

21246460641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21246460641 is a deficient number, since it is larger than the sum of its proper divisors (13827061791).

21246460641 is a wasteful number, since it uses less digits than its factorization.

21246460641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337245420 (or 337245417 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 21246460641 in words is "twenty-one billion, two hundred forty-six million, four hundred sixty thousand, six hundred forty-one".