21048426 has 24 divisors (see below), whose sum is σ = 52120224. Its totient is φ = 6013800.

The previous prime is 21048421. The next prime is 21048451. The reversal of 21048426 is 62484012.

It is a self number, because there is not a number n which added to its sum of digits gives 21048426.

It is not an unprimeable number, because it can be changed into a prime (21048421) 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, 83400 + ... + 83651.

It is an arithmetic number, because the mean of its divisors is an integer number (2171676).

Almost surely, 2^21048426 is an apocalyptic number.

21048426 is an abundant number, since it is smaller than the sum of its proper divisors (31071798).

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

21048426 is a wasteful number, since it uses less digits than its factorization.

21048426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167066 (or 167063 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 21048426 is about 4587.8563621805. The cubic root of 21048426 is about 276.1043241410.

The spelling of 21048426 in words is "twenty-one million, forty-eight thousand, four hundred twenty-six".