20418788040 has 96 divisors (see below), whose sum is σ = 71257423680. Its totient is φ = 4667150208.

The previous prime is 20418787967. The next prime is 20418788059. The reversal of 20418788040 is 4088781402.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 20418787983 and 20418788001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1730412 + ... + 1742171.

It is an arithmetic number, because the mean of its divisors is an integer number (742264830).

Almost surely, 2^20418788040 is an apocalyptic number.

20418788040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20418788040 is an abundant number, since it is smaller than the sum of its proper divisors (50838635640).

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

20418788040 is a wasteful number, since it uses less digits than its factorization.

20418788040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472611 (or 3472600 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 42.

The spelling of 20418788040 in words is "twenty billion, four hundred eighteen million, seven hundred eighty-eight thousand, forty".