20201909102 has 32 divisors (see below), whose sum is σ = 32005269504. Its totient is φ = 9544612000.

The previous prime is 20201909071. The next prime is 20201909111. The reversal of 20201909102 is 20190910202.

It is a happy number.

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, 2165027 + ... + 2174337.

It is an arithmetic number, because the mean of its divisors is an integer number (1000164672).

Almost surely, 2^20201909102 is an apocalyptic number.

20201909102 is a deficient number, since it is larger than the sum of its proper divisors (11803360402).

20201909102 is a wasteful number, since it uses less digits than its factorization.

20201909102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9904.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 20201909102 in words is "twenty billion, two hundred one million, nine hundred nine thousand, one hundred two".