20497450 has 24 divisors (see below), whose sum is σ = 38485260. Its totient is φ = 8121600.

The previous prime is 20497429. The next prime is 20497481. The reversal of 20497450 is 5479402.

It can be written as a sum of positive squares in 6 ways, for example, as 8862529 + 11634921 = 2977^2 + 3411^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3570 + ... + 7330.

Almost surely, 2^20497450 is an apocalyptic number.

20497450 is a deficient number, since it is larger than the sum of its proper divisors (17987810).

20497450 is a wasteful number, since it uses less digits than its factorization.

20497450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882 (or 3877 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20497450 is about 4527.4109599196. The cubic root of 20497450 is about 273.6738353471.

The spelling of 20497450 in words is "twenty million, four hundred ninety-seven thousand, four hundred fifty".