20747102 has 4 divisors (see below), whose sum is σ = 31120656. Its totient is φ = 10373550.

The previous prime is 20747087. The next prime is 20747131. The reversal of 20747102 is 20174702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20174702 = 2 ⋅10087351.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5186774 + ... + 5186777.

It is an arithmetic number, because the mean of its divisors is an integer number (7780164).

Almost surely, 2^20747102 is an apocalyptic number.

20747102 is a deficient number, since it is larger than the sum of its proper divisors (10373554).

20747102 is a wasteful number, since it uses less digits than its factorization.

20747102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373553.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20747102 is about 4554.8986816394. The cubic root of 20747102 is about 274.7804396254.

The spelling of 20747102 in words is "twenty million, seven hundred forty-seven thousand, one hundred two".