21113603023 has 2 divisors, whose sum is σ = 21113603024. Its totient is φ = 21113603022.

The previous prime is 21113602969. The next prime is 21113603081. The reversal of 21113603023 is 32030631112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113603023 is a prime.

It is a super-3 number, since 3×21113603023³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21113602985 and 21113603003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113603123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556801511 + 10556801512.

It is an arithmetic number, because the mean of its divisors is an integer number (10556801512).

Almost surely, 2^21113603023 is an apocalyptic number.

21113603023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113603023 is an equidigital number, since it uses as much as digits as its factorization.

21113603023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The spelling of 21113603023 in words is "twenty-one billion, one hundred thirteen million, six hundred three thousand, twenty-three".