21603346506231 has 32 divisors (see below), whose sum is σ = 32978168391168. Its totient is φ = 12322727976960.

The previous prime is 21603346506187. The next prime is 21603346506257. The reversal of 21603346506231 is 13260564330612.

It is not a de Polignac number, because 21603346506231 - 2⁶ = 21603346506167 is a prime.

It is a super-2 number, since 2×21603346506231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21603346506431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322775536 + ... + 322842458.

It is an arithmetic number, because the mean of its divisors is an integer number (1030567762224).

Almost surely, 2^{21603346506231} is an apocalyptic number.

21603346506231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21603346506231 is a deficient number, since it is larger than the sum of its proper divisors (11374821884937).

21603346506231 is a wasteful number, since it uses less digits than its factorization.

21603346506231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94151.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 21603346506231 in words is "twenty-one trillion, six hundred three billion, three hundred forty-six million, five hundred six thousand, two hundred thirty-one".