21608414139 has 16 divisors (see below), whose sum is σ = 31044968192. Its totient is φ = 13289984928.

The previous prime is 21608414101. The next prime is 21608414161. The reversal of 21608414139 is 93141480612.

It is not a de Polignac number, because 21608414139 - 2²¹ = 21606316987 is a prime.

It is a super-2 number, since 2×21608414139² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21608414097 and 21608414106.

It is not an unprimeable number, because it can be changed into a prime (21608414339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85837 + ... + 224910.

It is an arithmetic number, because the mean of its divisors is an integer number (1940310512).

Almost surely, 2^21608414139 is an apocalyptic number.

21608414139 is a deficient number, since it is larger than the sum of its proper divisors (9436554053).

21608414139 is a wasteful number, since it uses less digits than its factorization.

21608414139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312546.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 21608414139 in words is "twenty-one billion, six hundred eight million, four hundred fourteen thousand, one hundred thirty-nine".