20030040 has 48 divisors (see below), whose sum is σ = 65098800. Its totient is φ = 5341248.

The previous prime is 20030027. The next prime is 20030053. The reversal of 20030040 is 4003002.

It is an interprime number because it is at equal distance from previous prime (20030027) and next prime (20030053).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27460 + ... + 28179.

It is an arithmetic number, because the mean of its divisors is an integer number (1356225).

Almost surely, 2^20030040 is an apocalyptic number.

20030040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20030040 is an abundant number, since it is smaller than the sum of its proper divisors (45068760).

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

20030040 is a wasteful number, since it uses less digits than its factorization.

20030040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55656 (or 55649 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 20030040 is about 4475.4932689034. The cubic root of 20030040 is about 271.5775955167.

Adding to 20030040 its reverse (4003002), we get a palindrome (24033042).

The spelling of 20030040 in words is "twenty million, thirty thousand, forty".