19720495 has 16 divisors (see below), whose sum is σ = 24956928. Its totient is φ = 14937120.

The previous prime is 19720489. The next prime is 19720501. The reversal of 19720495 is 59402791.

It is an interprime number because it is at equal distance from previous prime (19720489) and next prime (19720501).

It is not a de Polignac number, because 19720495 - 2³ = 19720487 is a prime.

It is a Duffinian 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, 5932 + ... + 8638.

It is an arithmetic number, because the mean of its divisors is an integer number (1559808).

Almost surely, 2^19720495 is an apocalyptic number.

19720495 is a deficient number, since it is larger than the sum of its proper divisors (5236433).

19720495 is a wasteful number, since it uses less digits than its factorization.

19720495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 19720495 is about 4440.7763960821. The cubic root of 19720495 is about 270.1713361525.

The spelling of 19720495 in words is "nineteen million, seven hundred twenty thousand, four hundred ninety-five".