21250468 has 6 divisors (see below), whose sum is σ = 37188326. Its totient is φ = 10625232.

The previous prime is 21250451. The next prime is 21250477. The reversal of 21250468 is 86405212.

It can be written as a sum of positive squares in only one way, i.e., 14500864 + 6749604 = 3808^2 + 2598^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2656305 + ... + 2656312.

Almost surely, 2^21250468 is an apocalyptic number.

It is an amenable number.

21250468 is a deficient number, since it is larger than the sum of its proper divisors (15937858).

21250468 is a wasteful number, since it uses less digits than its factorization.

21250468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312621 (or 5312619 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 21250468 is about 4609.8229900941. The cubic root of 21250468 is about 276.9849462032.

The spelling of 21250468 in words is "twenty-one million, two hundred fifty thousand, four hundred sixty-eight".