20091919102 has 16 divisors (see below), whose sum is σ = 30290790240. Its totient is φ = 9995051232.

The previous prime is 20091919091. The next prime is 20091919109. The reversal of 20091919102 is 20191919002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20091919109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669103 + ... + 698485.

It is an arithmetic number, because the mean of its divisors is an integer number (1893174390).

Almost surely, 2^20091919102 is an apocalyptic number.

20091919102 is a deficient number, since it is larger than the sum of its proper divisors (10198871138).

20091919102 is a wasteful number, since it uses less digits than its factorization.

20091919102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31107.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 20091919102 in words is "twenty billion, ninety-one million, nine hundred nineteen thousand, one hundred two".