21386413719 has 48 divisors (see below), whose sum is σ = 34972689024. Its totient is φ = 12952288800.

The previous prime is 21386413717. The next prime is 21386413723. The reversal of 21386413719 is 91731468312.

21386413719 is a `hidden beast` number, since 213 + 8 + 6 + 413 + 7 + 19 = 666.

It is not a de Polignac number, because 21386413719 - 2¹ = 21386413717 is a prime.

It is a super-2 number, since 2×21386413719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21386413717) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7196904 + ... + 7199874.

It is an arithmetic number, because the mean of its divisors is an integer number (728597688).

Almost surely, 2^21386413719 is an apocalyptic number.

21386413719 is a deficient number, since it is larger than the sum of its proper divisors (13586275305).

21386413719 is a wasteful number, since it uses less digits than its factorization.

21386413719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690 (or 5678 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 21386413719 in words is "twenty-one billion, three hundred eighty-six million, four hundred thirteen thousand, seven hundred nineteen".