20019632 has 10 divisors (see below), whose sum is σ = 38788068. Its totient is φ = 10009808.

The previous prime is 20019631. The next prime is 20019641. The reversal of 20019632 is 23691002.

It is a junction number, because it is equal to n+sod(n) for n = 20019598 and 20019607.

It is not an unprimeable number, because it can be changed into a prime (20019631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625598 + ... + 625629.

Almost surely, 2^20019632 is an apocalyptic number.

It is an amenable number.

20019632 is a deficient number, since it is larger than the sum of its proper divisors (18768436).

20019632 is a wasteful number, since it uses less digits than its factorization.

20019632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251235 (or 1251229 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 20019632 is about 4474.3303409561. The cubic root of 20019632 is about 271.5305483592.

The spelling of 20019632 in words is "twenty million, nineteen thousand, six hundred thirty-two".