20123370 has 32 divisors (see below), whose sum is σ = 53663040. Its totient is φ = 5366160.

The previous prime is 20123347. The next prime is 20123377. The reversal of 20123370 is 7332102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36996 + ... + 37535.

It is an arithmetic number, because the mean of its divisors is an integer number (1676970).

Almost surely, 2^20123370 is an apocalyptic number.

20123370 is an abundant number, since it is smaller than the sum of its proper divisors (33539670).

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

20123370 is a wasteful number, since it uses less digits than its factorization.

20123370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74547 (or 74541 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20123370 is about 4485.9079348556. The cubic root of 20123370 is about 271.9987474712.

Adding to 20123370 its reverse (7332102), we get a palindrome (27455472).

The spelling of 20123370 in words is "twenty million, one hundred twenty-three thousand, three hundred seventy".