20002000021998 has 32 divisors (see below), whose sum is σ = 40219817254560. Its totient is φ = 6631423411200.

The previous prime is 20002000021951. The next prime is 20002000022087. The reversal of 20002000021998 is 89912000020002.

It is a happy number.

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, 6107703 + ... + 8792498.

It is an arithmetic number, because the mean of its divisors is an integer number (1256869289205).

Almost surely, 2^{20002000021998} is an apocalyptic number.

20002000021998 is an abundant number, since it is smaller than the sum of its proper divisors (20217817232562).

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

20002000021998 is a wasteful number, since it uses less digits than its factorization.

20002000021998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14901412.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 20002000021998 in words is "twenty trillion, two billion, twenty-one thousand, nine hundred ninety-eight".