20493208 has 8 divisors (see below), whose sum is σ = 38424780. Its totient is φ = 10246600.

The previous prime is 20493197. The next prime is 20493257. The reversal of 20493208 is 80239402.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280818 + ... + 1280833.

Almost surely, 2^20493208 is an apocalyptic number.

It is an amenable number.

20493208 is a deficient number, since it is larger than the sum of its proper divisors (17931572).

20493208 is a wasteful number, since it uses less digits than its factorization.

20493208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561657 (or 2561653 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20493208 is about 4526.9424560071. The cubic root of 20493208 is about 273.6549548765.

The spelling of 20493208 in words is "twenty million, four hundred ninety-three thousand, two hundred eight".