21670848623 has 8 divisors (see below), whose sum is σ = 22380473856. Its totient is φ = 20961883800.

The previous prime is 21670848559. The next prime is 21670848637. The reversal of 21670848623 is 32684807612.

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

It is not a de Polignac number, because 21670848623 - 2⁶ = 21670848559 is a prime.

It is a super-2 number, since 2×21670848623² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21670848643) 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, 97961 + ... + 230082.

It is an arithmetic number, because the mean of its divisors is an integer number (2797559232).

Almost surely, 2^21670848623 is an apocalyptic number.

21670848623 is a deficient number, since it is larger than the sum of its proper divisors (709625233).

21670848623 is a wasteful number, since it uses less digits than its factorization.

21670848623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330205.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 21670848623 in words is "twenty-one billion, six hundred seventy million, eight hundred forty-eight thousand, six hundred twenty-three".