20787878702 has 4 divisors (see below), whose sum is σ = 31181818056. Its totient is φ = 10393939350.

The previous prime is 20787878689. The next prime is 20787878711.

20787878702 is nontrivially palindromic in base 10.

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

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, 5196969674 + ... + 5196969677.

It is an arithmetic number, because the mean of its divisors is an integer number (7795454514).

Almost surely, 2^20787878702 is an apocalyptic number.

20787878702 is a deficient number, since it is larger than the sum of its proper divisors (10393939354).

20787878702 is a wasteful number, since it uses less digits than its factorization.

20787878702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10393939353.

The product of its (nonzero) digits is 4917248, while the sum is 56.

The spelling of 20787878702 in words is "twenty billion, seven hundred eighty-seven million, eight hundred seventy-eight thousand, seven hundred two".