42023667981 has 32 divisors (see below), whose sum is σ = 60039936000. Its totient is φ = 26065456128.

The previous prime is 42023667967. The next prime is 42023667991. The reversal of 42023667981 is 18976632024.

It is not a de Polignac number, because 42023667981 - 2⁵ = 42023667949 is a prime.

It is a super-2 number, since 2×42023667981² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 42023667981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42023667991) 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, 3703725 + ... + 3715053.

It is an arithmetic number, because the mean of its divisors is an integer number (1876248000).

Almost surely, 2^42023667981 is an apocalyptic number.

It is an amenable number.

42023667981 is a deficient number, since it is larger than the sum of its proper divisors (18016268019).

42023667981 is a wasteful number, since it uses less digits than its factorization.

42023667981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12513.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 42023667981 in words is "forty-two billion, twenty-three million, six hundred sixty-seven thousand, nine hundred eighty-one".