21479796 has 48 divisors (see below), whose sum is σ = 59976000. Its totient is φ = 6608736.

The previous prime is 21479779. The next prime is 21479839. The reversal of 21479796 is 69797412.

It is a super-2 number, since 2×21479796² = 922763272403232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6246 + ... + 9053.

It is an arithmetic number, because the mean of its divisors is an integer number (1249500).

Almost surely, 2^21479796 is an apocalyptic number.

21479796 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21479796 is an abundant number, since it is smaller than the sum of its proper divisors (38496204).

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

21479796 is a wasteful number, since it uses less digits than its factorization.

21479796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15325 (or 15317 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 21479796 is about 4634.6300823259. The cubic root of 21479796 is about 277.9777598964.

It can be divided in two parts, 2 and 1479796, that multiplied together give a palindrome (2959592).

The spelling of 21479796 in words is "twenty-one million, four hundred seventy-nine thousand, seven hundred ninety-six".