20373220 has 36 divisors (see below), whose sum is σ = 49771260. Its totient is φ = 6984768.

The previous prime is 20373211. The next prime is 20373229. The reversal of 20373220 is 2237302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20373211) and next prime (20373229).

It can be written as a sum of positive squares in 2 ways, for example, as 13147876 + 7225344 = 3626^2 + 2688^2 .

It is not an unprimeable number, because it can be changed into a prime (20373229) 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, 9415 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (1382535).

Almost surely, 2^20373220 is an apocalyptic number.

20373220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20373220 is an abundant number, since it is smaller than the sum of its proper divisors (29398040).

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

20373220 is a wasteful number, since it uses less digits than its factorization.

20373220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20812 (or 20803 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 20373220 is about 4513.6703468463. The cubic root of 20373220 is about 273.1198246728.

The spelling of 20373220 in words is "twenty million, three hundred seventy-three thousand, two hundred twenty".