22021043004 has 36 divisors (see below), whose sum is σ = 55669035240. Its totient is φ = 7339723680.

The previous prime is 22021042999. The next prime is 22021043027. The reversal of 22021043004 is 40034012022.

22021043004 is a `hidden beast` number, since 2 + 20 + 210 + 430 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630307 + ... + 664325.

It is an arithmetic number, because the mean of its divisors is an integer number (1546362090).

Almost surely, 2^22021043004 is an apocalyptic number.

It is an amenable number.

22021043004 is an abundant number, since it is smaller than the sum of its proper divisors (33647992236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22021043004 is a wasteful number, since it uses less digits than its factorization.

22021043004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52010 (or 52005 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 22021043004 its reverse (40034012022), we get a palindrome (62055055026).

The spelling of 22021043004 in words is "twenty-two billion, twenty-one million, forty-three thousand, four".