21365404414 has 32 divisors (see below), whose sum is σ = 33815418624. Its totient is φ = 10110147840.

The previous prime is 21365404399. The next prime is 21365404427. The reversal of 21365404414 is 41440456312.

It is a super-3 number, since 3×21365404414³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21365404414.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1018132 + ... + 1038904.

It is an arithmetic number, because the mean of its divisors is an integer number (1056731832).

Almost surely, 2^21365404414 is an apocalyptic number.

21365404414 is a deficient number, since it is larger than the sum of its proper divisors (12450014210).

21365404414 is a wasteful number, since it uses less digits than its factorization.

21365404414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21172.

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 21365404414 in words is "twenty-one billion, three hundred sixty-five million, four hundred four thousand, four hundred fourteen".