21150015432023 has 2 divisors, whose sum is σ = 21150015432024. Its totient is φ = 21150015432022.

The previous prime is 21150015431989. The next prime is 21150015432131. The reversal of 21150015432023 is 32023451005112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21150015432023 is a prime.

It is a super-2 number, since 2×21150015432023² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21150015432823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575007716011 + 10575007716012.

It is an arithmetic number, because the mean of its divisors is an integer number (10575007716012).

Almost surely, 2^{21150015432023} is an apocalyptic number.

21150015432023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21150015432023 is an equidigital number, since it uses as much as digits as its factorization.

21150015432023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21150015432023 its reverse (32023451005112), we get a palindrome (53173466437135).

The spelling of 21150015432023 in words is "twenty-one trillion, one hundred fifty billion, fifteen million, four hundred thirty-two thousand, twenty-three".