20199494490 has 64 divisors (see below), whose sum is σ = 55424791296. Its totient is φ = 4615322112.

The previous prime is 20199494489. The next prime is 20199494509. The reversal of 20199494490 is 9449499102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 603844 + ... + 636416.

It is an arithmetic number, because the mean of its divisors is an integer number (866012364).

Almost surely, 2^20199494490 is an apocalyptic number.

20199494490 is an abundant number, since it is smaller than the sum of its proper divisors (35225296806).

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

20199494490 is a wasteful number, since it uses less digits than its factorization.

20199494490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35543.

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 20199494490 in words is "twenty billion, one hundred ninety-nine million, four hundred ninety-four thousand, four hundred ninety".