20497473 has 12 divisors (see below), whose sum is σ = 29677440. Its totient is φ = 13632696.

The previous prime is 20497429. The next prime is 20497481. The reversal of 20497473 is 37479402.

It is not a de Polignac number, because 20497473 - 2⁹ = 20496961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20497073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1708 + ... + 6626.

It is an arithmetic number, because the mean of its divisors is an integer number (2473120).

Almost surely, 2^20497473 is an apocalyptic number.

It is an amenable number.

20497473 is a deficient number, since it is larger than the sum of its proper divisors (9179967).

20497473 is a wasteful number, since it uses less digits than its factorization.

20497473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5388 (or 5385 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20497473 is about 4527.4135000020. The cubic root of 20497473 is about 273.6739377094.

The spelling of 20497473 in words is "twenty million, four hundred ninety-seven thousand, four hundred seventy-three".