19938963 has 16 divisors (see below), whose sum is σ = 29264256. Its totient is φ = 11975040.

The previous prime is 19938949. The next prime is 19939013. The reversal of 19938963 is 36983991.

It is a happy number.

It is not a de Polignac number, because 19938963 - 2⁶ = 19938899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19918963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056 + ... + 6402.

It is an arithmetic number, because the mean of its divisors is an integer number (1829016).

Almost surely, 2^19938963 is an apocalyptic number.

19938963 is a deficient number, since it is larger than the sum of its proper divisors (9325293).

19938963 is a wasteful number, since it uses less digits than its factorization.

19938963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474.

The product of its digits is 314928, while the sum is 48.

The square root of 19938963 is about 4465.3065964164. The cubic root of 19938963 is about 271.1653470965.

The spelling of 19938963 in words is "nineteen million, nine hundred thirty-eight thousand, nine hundred sixty-three".