21013000422 has 24 divisors (see below), whose sum is σ = 43932669144. Its totient is φ = 6699796224.

The previous prime is 21013000363. The next prime is 21013000427. The reversal of 21013000422 is 22400031012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013000427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3307003 + ... + 3313350.

It is an arithmetic number, because the mean of its divisors is an integer number (1830527881).

Almost surely, 2^21013000422 is an apocalyptic number.

21013000422 is an abundant number, since it is smaller than the sum of its proper divisors (22919668722).

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

21013000422 is a wasteful number, since it uses less digits than its factorization.

21013000422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620404 (or 6620381 counting only the distinct ones).

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

Adding to 21013000422 its reverse (22400031012), we get a palindrome (43413031434).

The spelling of 21013000422 in words is "twenty-one billion, thirteen million, four hundred twenty-two", and thus it is an aban number.