21376542923 has 8 divisors (see below), whose sum is σ = 21432600000. Its totient is φ = 21320524288.

The previous prime is 21376542881. The next prime is 21376542973. The reversal of 21376542923 is 32924567312.

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 21376542923 - 2¹⁰ = 21376541899 is a prime.

It is a super-2 number, since 2×21376542923² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21376542973) 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, 1349453 + ... + 1365201.

It is an arithmetic number, because the mean of its divisors is an integer number (2679075000).

Almost surely, 2^21376542923 is an apocalyptic number.

21376542923 is a deficient number, since it is larger than the sum of its proper divisors (56057077).

21376542923 is a wasteful number, since it uses less digits than its factorization.

21376542923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19221.

The product of its digits is 544320, while the sum is 44.

The spelling of 21376542923 in words is "twenty-one billion, three hundred seventy-six million, five hundred forty-two thousand, nine hundred twenty-three".