21862997863 has 8 divisors (see below), whose sum is σ = 25000358432. Its totient is φ = 18729156096.

The previous prime is 21862997831. The next prime is 21862997963. The reversal of 21862997863 is 36879926812.

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

It is not a de Polignac number, because 21862997863 - 2⁵ = 21862997831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21862997813) 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, 866370 + ... + 891247.

It is an arithmetic number, because the mean of its divisors is an integer number (3125044804).

Almost surely, 2^21862997863 is an apocalyptic number.

21862997863 is a deficient number, since it is larger than the sum of its proper divisors (3137360569).

21862997863 is a wasteful number, since it uses less digits than its factorization.

21862997863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759401.

The product of its digits is 15676416, while the sum is 61.

The spelling of 21862997863 in words is "twenty-one billion, eight hundred sixty-two million, nine hundred ninety-seven thousand, eight hundred sixty-three".