21393057814510 has 64 divisors (see below), whose sum is σ = 40899480698880. Its totient is φ = 8033933859840.

The previous prime is 21393057814501. The next prime is 21393057814517. The reversal of 21393057814510 is 1541875039312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21393057814517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20903550 + ... + 21903070.

It is an arithmetic number, because the mean of its divisors is an integer number (639054385920).

Almost surely, 2^{21393057814510} is an apocalyptic number.

21393057814510 is a deficient number, since it is larger than the sum of its proper divisors (19506422884370).

21393057814510 is a wasteful number, since it uses less digits than its factorization.

21393057814510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000561.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 21393057814510 in words is "twenty-one trillion, three hundred ninety-three billion, fifty-seven million, eight hundred fourteen thousand, five hundred ten".