23400100981 has 2 divisors, whose sum is σ = 23400100982. Its totient is φ = 23400100980.

The previous prime is 23400100961. The next prime is 23400101029. The reversal of 23400100981 is 18900100432.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11813516100 + 11586584881 = 108690^2 + 107641^2 .

It is a cyclic number.

It is not a de Polignac number, because 23400100981 - 2³³ = 14810166389 is a prime.

It is a super-2 number, since 2×23400100981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23400100951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11700050490 + 11700050491.

It is an arithmetic number, because the mean of its divisors is an integer number (11700050491).

Almost surely, 2^23400100981 is an apocalyptic number.

It is an amenable number.

23400100981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23400100981 is an equidigital number, since it uses as much as digits as its factorization.

23400100981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

It can be divided in two parts, 23 and 400100981, that added together give a palindrome (400101004).

The spelling of 23400100981 in words is "twenty-three billion, four hundred million, one hundred thousand, nine hundred eighty-one".