20473320 has 64 divisors (see below), whose sum is σ = 70197120. Its totient is φ = 4679424.

The previous prime is 20473307. The next prime is 20473331. The reversal of 20473320 is 2337402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 11347 + ... + 13026.

It is an arithmetic number, because the mean of its divisors is an integer number (1096830).

Almost surely, 2^20473320 is an apocalyptic number.

20473320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20473320 is an abundant number, since it is smaller than the sum of its proper divisors (49723800).

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

20473320 is a wasteful number, since it uses less digits than its factorization.

20473320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24394 (or 24390 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 20473320 is about 4524.7452966990. The cubic root of 20473320 is about 273.5664017770.

The spelling of 20473320 in words is "twenty million, four hundred seventy-three thousand, three hundred twenty".