19902028101 has 8 divisors (see below), whose sum is σ = 26537488320. Its totient is φ = 13267293312.

The previous prime is 19902028073. The next prime is 19902028103. The reversal of 19902028101 is 10182020991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19902028101 - 2⁹ = 19902027589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19902028103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113740 + ... + 229653.

It is an arithmetic number, because the mean of its divisors is an integer number (3317186040).

Almost surely, 2^19902028101 is an apocalyptic number.

It is an amenable number.

19902028101 is a deficient number, since it is larger than the sum of its proper divisors (6635460219).

19902028101 is a wasteful number, since it uses less digits than its factorization.

19902028101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362715.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 19902028101 in words is "nineteen billion, nine hundred two million, twenty-eight thousand, one hundred one".