21310730986040 has 32 divisors (see below), whose sum is σ = 48299138488080. Its totient is φ = 8462071279872.

The previous prime is 21310730986019. The next prime is 21310730986091. The reversal of 21310730986040 is 4068903701312.

It is a junction number, because it is equal to n+sod(n) for n = 21310730985982 and 21310730986000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1944404282 + ... + 1944415241.

Almost surely, 2^{21310730986040} is an apocalyptic number.

21310730986040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310730986040 is an abundant number, since it is smaller than the sum of its proper divisors (26988407502040).

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

21310730986040 is a wasteful number, since it uses less digits than its factorization.

21310730986040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888819671 (or 3888819667 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 21310730986040 in words is "twenty-one trillion, three hundred ten billion, seven hundred thirty million, nine hundred eighty-six thousand, forty".