21010223004 has 24 divisors (see below), whose sum is σ = 49381695888. Its totient is φ = 6952287360.

The previous prime is 21010222997. The next prime is 21010223027. The reversal of 21010223004 is 40032201012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6388327 + ... + 6391614.

It is an arithmetic number, because the mean of its divisors is an integer number (2057570662).

Almost surely, 2^21010223004 is an apocalyptic number.

It is an amenable number.

21010223004 is an abundant number, since it is smaller than the sum of its proper divisors (28371472884).

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

21010223004 is a wasteful number, since it uses less digits than its factorization.

21010223004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12780085 (or 12780083 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21010223004 its reverse (40032201012), we get a palindrome (61042424016).

The spelling of 21010223004 in words is "twenty-one billion, ten million, two hundred twenty-three thousand, four".