21450652 has 6 divisors (see below), whose sum is σ = 37538648. Its totient is φ = 10725324.

The previous prime is 21450647. The next prime is 21450661. The reversal of 21450652 is 25605412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2681328 + ... + 2681335.

Almost surely, 2^21450652 is an apocalyptic number.

It is an amenable number.

21450652 is a deficient number, since it is larger than the sum of its proper divisors (16087996).

21450652 is a wasteful number, since it uses less digits than its factorization.

21450652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362667 (or 5362665 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 21450652 is about 4631.4848590922. The cubic root of 21450652 is about 277.8519820009.

The spelling of 21450652 in words is "twenty-one million, four hundred fifty thousand, six hundred fifty-two".