20219177919 has 32 divisors (see below), whose sum is σ = 29451755520. Its totient is φ = 12289485312.

The previous prime is 20219177911. The next prime is 20219177977. The reversal of 20219177919 is 91977191202.

It is not a de Polignac number, because 20219177919 - 2³ = 20219177911 is a prime.

It is a super-2 number, since 2×20219177919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20219177911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166194 + ... + 260880.

It is an arithmetic number, because the mean of its divisors is an integer number (920367360).

Almost surely, 2^20219177919 is an apocalyptic number.

20219177919 is a deficient number, since it is larger than the sum of its proper divisors (9232577601).

20219177919 is a wasteful number, since it uses less digits than its factorization.

20219177919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94839.

The product of its (nonzero) digits is 142884, while the sum is 48.

The spelling of 20219177919 in words is "twenty billion, two hundred nineteen million, one hundred seventy-seven thousand, nine hundred nineteen".