20497444 has 48 divisors (see below), whose sum is σ = 42154560. Its totient is φ = 8616960.

The previous prime is 20497429. The next prime is 20497481. The reversal of 20497444 is 44479402.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49912 + ... + 50320.

It is an arithmetic number, because the mean of its divisors is an integer number (878220).

Almost surely, 2^20497444 is an apocalyptic number.

It is an amenable number.

20497444 is an abundant number, since it is smaller than the sum of its proper divisors (21657116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20497444 is a wasteful number, since it uses less digits than its factorization.

20497444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 20497444 is about 4527.4102972892. The cubic root of 20497444 is about 273.6738086439.

The spelling of 20497444 in words is "twenty million, four hundred ninety-seven thousand, four hundred forty-four".