21079652 has 36 divisors (see below), whose sum is σ = 41057100. Its totient is φ = 9461760.

The previous prime is 21079651. The next prime is 21079673. The reversal of 21079652 is 25697012.

It can be written as a sum of positive squares in 2 ways, for example, as 11182336 + 9897316 = 3344^2 + 3146^2 .

It is a super-2 number, since 2×21079652² = 888703456882208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21079651) 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, 46724 + ... + 47172.

It is an arithmetic number, because the mean of its divisors is an integer number (1140475).

Almost surely, 2^21079652 is an apocalyptic number.

21079652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21079652 is a deficient number, since it is larger than the sum of its proper divisors (19977448).

21079652 is a wasteful number, since it uses less digits than its factorization.

21079652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 21079652 is about 4591.2582153479. The cubic root of 21079652 is about 276.2407931522.

The spelling of 21079652 in words is "twenty-one million, seventy-nine thousand, six hundred fifty-two".