19211039220 has 48 divisors (see below), whose sum is σ = 53874934848. Its totient is φ = 5114941440.

The previous prime is 19211039203. The next prime is 19211039231. The reversal of 19211039220 is 2293011291.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 211294 + ... + 288213.

It is an arithmetic number, because the mean of its divisors is an integer number (1122394476).

Almost surely, 2^19211039220 is an apocalyptic number.

19211039220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19211039220 is an abundant number, since it is smaller than the sum of its proper divisors (34663895628).

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

19211039220 is a wasteful number, since it uses less digits than its factorization.

19211039220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500160 (or 500158 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 19211039220 in words is "nineteen billion, two hundred eleven million, thirty-nine thousand, two hundred twenty".