20020000400 has 60 divisors (see below), whose sum is σ = 50189293632. Its totient is φ = 7659822720.

The previous prime is 20020000373. The next prime is 20020000409. The reversal of 20020000400 is 400002002.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (20020000409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1078844 + ... + 1097243.

Almost surely, 2^20020000400 is an apocalyptic number.

20020000400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020000400 is an abundant number, since it is smaller than the sum of its proper divisors (30169293232).

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

20020000400 is a wasteful number, since it uses less digits than its factorization.

20020000400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176128 (or 2176117 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

Adding to 20020000400 its reverse (400002002), we get a palindrome (20420002402).

The spelling of 20020000400 in words is "twenty billion, twenty million, four hundred", and thus it is an aban number.