21463137983 has 8 divisors (see below), whose sum is σ = 24653816352. Its totient is φ = 18303588576.

The previous prime is 21463137967. The next prime is 21463138001. The reversal of 21463137983 is 38973136412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21463137983 - 2⁴ = 21463137967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463137083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7780760 + ... + 7783517.

It is an arithmetic number, because the mean of its divisors is an integer number (3081727044).

Almost surely, 2^21463137983 is an apocalyptic number.

21463137983 is a deficient number, since it is larger than the sum of its proper divisors (3190678369).

21463137983 is a wasteful number, since it uses less digits than its factorization.

21463137983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15564481.

The product of its digits is 653184, while the sum is 47.

The spelling of 21463137983 in words is "twenty-one billion, four hundred sixty-three million, one hundred thirty-seven thousand, nine hundred eighty-three".