19928051 has 32 divisors (see below), whose sum is σ = 25062912. Its totient is φ = 15586560.

The previous prime is 19928039. The next prime is 19928057. The reversal of 19928051 is 15082991.

It is not a de Polignac number, because 19928051 - 2¹⁰ = 19927027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19928057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240056 + ... + 240138.

It is an arithmetic number, because the mean of its divisors is an integer number (783216).

Almost surely, 2^19928051 is an apocalyptic number.

19928051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19928051 is a deficient number, since it is larger than the sum of its proper divisors (5134861).

19928051 is a wasteful number, since it uses less digits than its factorization.

19928051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 19928051 is about 4464.0845646112. The cubic root of 19928051 is about 271.1158711664.

The spelling of 19928051 in words is "nineteen million, nine hundred twenty-eight thousand, fifty-one".