21400796 has 6 divisors (see below), whose sum is σ = 37451400. Its totient is φ = 10700396.

The previous prime is 21400793. The next prime is 21400801. The reversal of 21400796 is 69700412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2675096 + ... + 2675103.

It is an arithmetic number, because the mean of its divisors is an integer number (6241900).

Almost surely, 2^21400796 is an apocalyptic number.

It is an amenable number.

21400796 is a deficient number, since it is larger than the sum of its proper divisors (16050604).

21400796 is a wasteful number, since it uses less digits than its factorization.

21400796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350203 (or 5350201 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 21400796 is about 4626.0994368907. The cubic root of 21400796 is about 277.6365521165.

The spelling of 21400796 in words is "twenty-one million, four hundred thousand, seven hundred ninety-six".