20050040 has 32 divisors (see below), whose sum is σ = 46165680. Its totient is φ = 7832832.

The previous prime is 20050039. The next prime is 20050057. The reversal of 20050040 is 4005002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4109 + ... + 7548.

Almost surely, 2^20050040 is an apocalyptic number.

20050040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20050040 is an abundant number, since it is smaller than the sum of its proper divisors (26115640).

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

20050040 is a wasteful number, since it uses less digits than its factorization.

20050040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711 (or 11707 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 20050040 is about 4477.7271020016. The cubic root of 20050040 is about 271.6679555478.

Adding to 20050040 its reverse (4005002), we get a palindrome (24055042).

The spelling of 20050040 in words is "twenty million, fifty thousand, forty".