21426104 has 32 divisors (see below), whose sum is σ = 46224480. Its totient is φ = 9120384.

The previous prime is 21426101. The next prime is 21426109. The reversal of 21426104 is 40162412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21426101) 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, 7574 + ... + 10010.

It is an arithmetic number, because the mean of its divisors is an integer number (1444515).

Almost surely, 2^21426104 is an apocalyptic number.

It is an amenable number.

21426104 is an abundant number, since it is smaller than the sum of its proper divisors (24798376).

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

21426104 is a wasteful number, since it uses less digits than its factorization.

21426104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607 (or 2603 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21426104 is about 4628.8339784442. The cubic root of 21426104 is about 277.7459508187.

Adding to 21426104 its reverse (40162412), we get a palindrome (61588516).

The spelling of 21426104 in words is "twenty-one million, four hundred twenty-six thousand, one hundred four".