20477944 has 32 divisors (see below), whose sum is σ = 40399200. Its totient is φ = 9717120.

The previous prime is 20477929. The next prime is 20477957. The reversal of 20477944 is 44977402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13429 + ... + 14875.

It is an arithmetic number, because the mean of its divisors is an integer number (1262475).

Almost surely, 2^20477944 is an apocalyptic number.

It is an amenable number.

20477944 is a deficient number, since it is larger than the sum of its proper divisors (19921256).

20477944 is a wasteful number, since it uses less digits than its factorization.

20477944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1539 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20477944 is about 4525.2562358390. The cubic root of 20477944 is about 273.5869956657.

The spelling of 20477944 in words is "twenty million, four hundred seventy-seven thousand, nine hundred forty-four".