20018002000 has 80 divisors (see below), whose sum is σ = 49965087744. Its totient is φ = 7748880000.

The previous prime is 20018001977. The next prime is 20018002021. The reversal of 20018002000 is 20081002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99436 + ... + 223435.

Almost surely, 2^20018002000 is an apocalyptic number.

20018002000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20018002000 is an abundant number, since it is smaller than the sum of its proper divisors (29947085744).

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

20018002000 is a wasteful number, since it uses less digits than its factorization.

20018002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322925 (or 322909 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20018002000 its reverse (20081002), we get a palindrome (20038083002).

The spelling of 20018002000 in words is "twenty billion, eighteen million, two thousand".