20238078 has 48 divisors (see below), whose sum is σ = 49576320. Its totient is φ = 5476464.

The previous prime is 20238073. The next prime is 20238083. The reversal of 20238078 is 87083202.

It is an interprime number because it is at equal distance from previous prime (20238073) and next prime (20238083).

It is a super-2 number, since 2×20238078² = 819159602268168, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3775 + ... + 7397.

It is an arithmetic number, because the mean of its divisors is an integer number (1032840).

Almost surely, 2^20238078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20238078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24788160).

20238078 is an abundant number, since it is smaller than the sum of its proper divisors (29338242).

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

20238078 is a wasteful number, since it uses less digits than its factorization.

20238078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661 (or 3654 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20238078 is about 4498.6751383046. The cubic root of 20238078 is about 272.5145877778.

It can be divided in two parts, 2023 and 8078, that added together give a palindrome (10101).

The spelling of 20238078 in words is "twenty million, two hundred thirty-eight thousand, seventy-eight".