21423551860707 has 8 divisors (see below), whose sum is σ = 28564841429520. Its totient is φ = 14282315099520.

The previous prime is 21423551860679. The next prime is 21423551860717. The reversal of 21423551860707 is 70706815532412.

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

It is not a de Polignac number, because 21423551860707 - 2¹¹ = 21423551858659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21423551860707.

It is not an unprimeable number, because it can be changed into a prime (21423551860717) 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, 12245394 + ... + 13885127.

It is an arithmetic number, because the mean of its divisors is an integer number (3570605178690).

Almost surely, 2^{21423551860707} is an apocalyptic number.

21423551860707 is a deficient number, since it is larger than the sum of its proper divisors (7141289568813).

21423551860707 is a wasteful number, since it uses less digits than its factorization.

21423551860707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26403813.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 21423551860707 in words is "twenty-one trillion, four hundred twenty-three billion, five hundred fifty-one million, eight hundred sixty thousand, seven hundred seven".