21365554706410 has 16 divisors (see below), whose sum is σ = 38483931066336. Its totient is φ = 8540459083728.

The previous prime is 21365554706401. The next prime is 21365554706411. The reversal of 21365554706410 is 1460745556312.

It is not an unprimeable number, because it can be changed into a prime (21365554706411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720334284 + ... + 720363943.

It is an arithmetic number, because the mean of its divisors is an integer number (2405245691646).

Almost surely, 2^{21365554706410} is an apocalyptic number.

21365554706410 is a deficient number, since it is larger than the sum of its proper divisors (17118376359926).

21365554706410 is a wasteful number, since it uses less digits than its factorization.

21365554706410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440699717.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 21365554706410 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred fifty-four million, seven hundred six thousand, four hundred ten".