21097361535 has 8 divisors (see below), whose sum is σ = 33755778480. Its totient is φ = 11251926144.

The previous prime is 21097361533. The next prime is 21097361587. The reversal of 21097361535 is 53516379012.

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

It is not a de Polignac number, because 21097361535 - 2¹ = 21097361533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21097361533) 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, 703245370 + ... + 703245399.

It is an arithmetic number, because the mean of its divisors is an integer number (4219472310).

Almost surely, 2^21097361535 is an apocalyptic number.

21097361535 is a deficient number, since it is larger than the sum of its proper divisors (12658416945).

21097361535 is a wasteful number, since it uses less digits than its factorization.

21097361535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406490777.

The product of its (nonzero) digits is 170100, while the sum is 42.

The spelling of 21097361535 in words is "twenty-one billion, ninety-seven million, three hundred sixty-one thousand, five hundred thirty-five".