22021011987 has 8 divisors (see below), whose sum is σ = 31619914704. Its totient is φ = 13551391968.

The previous prime is 22021011983. The next prime is 22021012049. The reversal of 22021011987 is 78911012022.

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

It is not a de Polignac number, because 22021011987 - 2² = 22021011983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22021011983) 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, 282320628 + ... + 282320705.

It is an arithmetic number, because the mean of its divisors is an integer number (3952489338).

Almost surely, 2^22021011987 is an apocalyptic number.

22021011987 is a deficient number, since it is larger than the sum of its proper divisors (9598902717).

22021011987 is a wasteful number, since it uses less digits than its factorization.

22021011987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564641349.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 22021011987 in words is "twenty-two billion, twenty-one million, eleven thousand, nine hundred eighty-seven".