19720954 has 16 divisors (see below), whose sum is σ = 32340960. Its totient is φ = 8944560.

The previous prime is 19720949. The next prime is 19720997. The reversal of 19720954 is 45902791.

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, 15652 + ... + 16864.

It is an arithmetic number, because the mean of its divisors is an integer number (2021310).

Almost surely, 2^19720954 is an apocalyptic number.

19720954 is a deficient number, since it is larger than the sum of its proper divisors (12620006).

19720954 is a wasteful number, since it uses less digits than its factorization.

19720954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965.

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

The square root of 19720954 is about 4440.8280759336. The cubic root of 19720954 is about 270.1734322405.

The spelling of 19720954 in words is "nineteen million, seven hundred twenty thousand, nine hundred fifty-four".