20673902 has 4 divisors (see below), whose sum is σ = 31010856. Its totient is φ = 10336950.

The previous prime is 20673893. The next prime is 20673907. The reversal of 20673902 is 20937602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5168474 + ... + 5168477.

It is an arithmetic number, because the mean of its divisors is an integer number (7752714).

Almost surely, 2^20673902 is an apocalyptic number.

20673902 is a deficient number, since it is larger than the sum of its proper divisors (10336954).

20673902 is a wasteful number, since it uses less digits than its factorization.

20673902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10336953.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20673902 is about 4546.8562765938. The cubic root of 20673902 is about 274.4568983745.

The spelling of 20673902 in words is "twenty million, six hundred seventy-three thousand, nine hundred two".