21803442623 has 8 divisors (see below), whose sum is σ = 22038261168. Its totient is φ = 21568829184.

The previous prime is 21803442607. The next prime is 21803442673. The reversal of 21803442623 is 32624430812.

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 21803442623 - 2⁴ = 21803442607 is a prime.

It is a super-2 number, since 2×21803442623² (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 (21803442673) 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, 167465 + ... + 267677.

It is an arithmetic number, because the mean of its divisors is an integer number (2754782646).

Almost surely, 2^21803442623 is an apocalyptic number.

21803442623 is a deficient number, since it is larger than the sum of its proper divisors (234818545).

21803442623 is a wasteful number, since it uses less digits than its factorization.

21803442623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102553.

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 21803442623 in words is "twenty-one billion, eight hundred three million, four hundred forty-two thousand, six hundred twenty-three".