21613096 has 8 divisors (see below), whose sum is σ = 40524570. Its totient is φ = 10806544.

The previous prime is 21613079. The next prime is 21613129. The reversal of 21613096 is 69031612.

It can be written as a sum of positive squares in only one way, i.e., 15920100 + 5692996 = 3990^2 + 2386^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1350811 + ... + 1350826.

Almost surely, 2^21613096 is an apocalyptic number.

It is an amenable number.

21613096 is a deficient number, since it is larger than the sum of its proper divisors (18911474).

21613096 is a wasteful number, since it uses less digits than its factorization.

21613096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701643 (or 2701639 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 21613096 is about 4648.9887072352. The cubic root of 21613096 is about 278.5516022081.

The spelling of 21613096 in words is "twenty-one million, six hundred thirteen thousand, ninety-six".