21097248677 has 8 divisors (see below), whose sum is σ = 21494743200. Its totient is φ = 20703166480.

The previous prime is 21097248647. The next prime is 21097248719. The reversal of 21097248677 is 77684279012.

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 21097248677 - 2²² = 21093054373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21097248647) 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, 840599 + ... + 865332.

It is an arithmetic number, because the mean of its divisors is an integer number (2686842900).

Almost surely, 2^21097248677 is an apocalyptic number.

It is an amenable number.

21097248677 is a deficient number, since it is larger than the sum of its proper divisors (397494523).

21097248677 is a wasteful number, since it uses less digits than its factorization.

21097248677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706163.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 21097248677 in words is "twenty-one billion, ninety-seven million, two hundred forty-eight thousand, six hundred seventy-seven".