19720252 has 24 divisors (see below), whose sum is σ = 36486800. Its totient is φ = 9300096.

The previous prime is 19720249. The next prime is 19720279. The reversal of 19720252 is 25202791.

19720252 is nontrivially palindromic in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 19720252.

It is a congruent number.

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, 23374 + ... + 24202.

Almost surely, 2^19720252 is an apocalyptic number.

It is an amenable number.

19720252 is a deficient number, since it is larger than the sum of its proper divisors (16766548).

19720252 is a wasteful number, since it uses less digits than its factorization.

19720252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 19720252 is about 4440.7490359173. The cubic root of 19720252 is about 270.1702264456.

It can be divided in two parts, 197 and 20252, that added together give a square (20449 = 143²).

The spelling of 19720252 in words is "nineteen million, seven hundred twenty thousand, two hundred fifty-two".