20492308 has 6 divisors (see below), whose sum is σ = 35861546. Its totient is φ = 10246152.

The previous prime is 20492273. The next prime is 20492321. The reversal of 20492308 is 80329402.

It can be written as a sum of positive squares in only one way, i.e., 15904144 + 4588164 = 3988^2 + 2142^2 .

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, 2561535 + ... + 2561542.

Almost surely, 2^20492308 is an apocalyptic number.

It is an amenable number.

20492308 is a deficient number, since it is larger than the sum of its proper divisors (15369238).

20492308 is a wasteful number, since it uses less digits than its factorization.

20492308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123081 (or 5123079 counting only the distinct ones).

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

The square root of 20492308 is about 4526.8430500736. The cubic root of 20492308 is about 273.6509487840.

The spelling of 20492308 in words is "twenty million, four hundred ninety-two thousand, three hundred eight".