20023278 has 32 divisors (see below), whose sum is σ = 44312832. Its totient is φ = 5980800.

The previous prime is 20023273. The next prime is 20023279. The reversal of 20023278 is 87232002.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2550 + ... + 6822.

It is an arithmetic number, because the mean of its divisors is an integer number (1384776).

Almost surely, 2^20023278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20023278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22156416).

20023278 is an abundant number, since it is smaller than the sum of its proper divisors (24289554).

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

20023278 is a wasteful number, since it uses less digits than its factorization.

20023278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20023278 is about 4474.7377576792. The cubic root of 20023278 is about 271.5470311844.

It can be divided in two parts, 20023 and 278, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 20023278 in words is "twenty million, twenty-three thousand, two hundred seventy-eight".