19920495 has 32 divisors (see below), whose sum is σ = 36652032. Its totient is φ = 9050112.

The previous prime is 19920491. The next prime is 19920499. The reversal of 19920495 is 59402991.

It is an interprime number because it is at equal distance from previous prime (19920491) and next prime (19920499).

It is not a de Polignac number, because 19920495 - 2² = 19920491 is a prime.

It is a super-2 number, since 2×19920495² = 793652242090050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19920491) 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, 19774 + ... + 20756.

It is an arithmetic number, because the mean of its divisors is an integer number (1145376).

Almost surely, 2^19920495 is an apocalyptic number.

19920495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19920495 is a deficient number, since it is larger than the sum of its proper divisors (16731537).

19920495 is a wasteful number, since it uses less digits than its factorization.

19920495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 19920495 is about 4463.2381742408. The cubic root of 19920495 is about 271.0816010399.

The spelling of 19920495 in words is "nineteen million, nine hundred twenty thousand, four hundred ninety-five".