19940245 has 16 divisors (see below), whose sum is σ = 25966080. Its totient is φ = 14612544.

The previous prime is 19940237. The next prime is 19940273. The reversal of 19940245 is 54204991.

It is a cyclic number.

It is not a de Polignac number, because 19940245 - 2³ = 19940237 is a prime.

It is a super-2 number, since 2×19940245² = 795226741320050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19940245.

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, 7932 + ... + 10138.

It is an arithmetic number, because the mean of its divisors is an integer number (1622880).

Almost surely, 2^19940245 is an apocalyptic number.

It is an amenable number.

19940245 is a deficient number, since it is larger than the sum of its proper divisors (6025835).

19940245 is a wasteful number, since it uses less digits than its factorization.

19940245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 19940245 is about 4465.4501452821. The cubic root of 19940245 is about 271.1711586077.

The spelling of 19940245 in words is "nineteen million, nine hundred forty thousand, two hundred forty-five".