20994988335 has 16 divisors (see below), whose sum is σ = 34750326240. Its totient is φ = 10811212160.

The previous prime is 20994988327. The next prime is 20994988369. The reversal of 20994988335 is 53388949902.

It is not a de Polignac number, because 20994988335 - 2³ = 20994988327 is a prime.

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, 24131736 + ... + 24132605.

It is an arithmetic number, because the mean of its divisors is an integer number (2171895390).

Almost surely, 2^20994988335 is an apocalyptic number.

20994988335 is a deficient number, since it is larger than the sum of its proper divisors (13755337905).

20994988335 is a wasteful number, since it uses less digits than its factorization.

20994988335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48264378.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 20994988335 in words is "twenty billion, nine hundred ninety-four million, nine hundred eighty-eight thousand, three hundred thirty-five".