21495269137 has 8 divisors (see below), whose sum is σ = 22976916480. Its totient is φ = 20059211040.

The previous prime is 21495269119. The next prime is 21495269141. The reversal of 21495269137 is 73196259412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21495269137 - 2⁷ = 21495269009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21495269167) 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, 11396337 + ... + 11398222.

It is an arithmetic number, because the mean of its divisors is an integer number (2872114560).

Almost surely, 2^21495269137 is an apocalyptic number.

It is an amenable number.

21495269137 is a deficient number, since it is larger than the sum of its proper divisors (1481647343).

21495269137 is a wasteful number, since it uses less digits than its factorization.

21495269137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22794623.

The product of its digits is 816480, while the sum is 49.

It can be divided in two parts, 214952 and 69137, that added together give a square (284089 = 533²).

The spelling of 21495269137 in words is "twenty-one billion, four hundred ninety-five million, two hundred sixty-nine thousand, one hundred thirty-seven".