20191726028 has 24 divisors (see below), whose sum is σ = 35730353904. Its totient is φ = 9983232000.

The previous prime is 20191726019. The next prime is 20191726067. The reversal of 20191726028 is 82062719102.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20191725982 and 20191726000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444323 + ... + 487653.

It is an arithmetic number, because the mean of its divisors is an integer number (1488764746).

Almost surely, 2^20191726028 is an apocalyptic number.

It is an amenable number.

20191726028 is a deficient number, since it is larger than the sum of its proper divisors (15538627876).

20191726028 is a wasteful number, since it uses less digits than its factorization.

20191726028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44633 (or 44631 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 20191726028 in words is "twenty billion, one hundred ninety-one million, seven hundred twenty-six thousand, twenty-eight".