20023770 has 32 divisors (see below), whose sum is σ = 51754752. Its totient is φ = 4928832.

The previous prime is 20023763. The next prime is 20023813. The reversal of 20023770 is 7732002.

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, 25282 + ... + 26061.

It is an arithmetic number, because the mean of its divisors is an integer number (1617336).

Almost surely, 2^20023770 is an apocalyptic number.

20023770 is an abundant number, since it is smaller than the sum of its proper divisors (31730982).

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

20023770 is a wasteful number, since it uses less digits than its factorization.

20023770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51366.

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 20023770 is about 4474.7927326302. The cubic root of 20023770 is about 271.5492552633.

Adding to 20023770 its reverse (7732002), we get a palindrome (27755772).

The spelling of 20023770 in words is "twenty million, twenty-three thousand, seven hundred seventy".