219923979090 has 32 divisors (see below), whose sum is σ = 540691151616. Its totient is φ = 57215994240.

The previous prime is 219923979053. The next prime is 219923979097. The reversal of 219923979090 is 90979329912.

It is not an unprimeable number, because it can be changed into a prime (219923979097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89398762 + ... + 89401221.

It is an arithmetic number, because the mean of its divisors is an integer number (16896598488).

Almost surely, 2^219923979090 is an apocalyptic number.

219923979090 is an abundant number, since it is smaller than the sum of its proper divisors (320767172526).

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

219923979090 is a wasteful number, since it uses less digits than its factorization.

219923979090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178800034.

The product of its (nonzero) digits is 4960116, while the sum is 60.

The spelling of 219923979090 in words is "two hundred nineteen billion, nine hundred twenty-three million, nine hundred seventy-nine thousand, ninety".