20725006678 has 4 divisors (see below), whose sum is σ = 31087510020. Its totient is φ = 10362503338.

The previous prime is 20725006667. The next prime is 20725006699. The reversal of 20725006678 is 87660052702.

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, 5181251668 + ... + 5181251671.

It is an arithmetic number, because the mean of its divisors is an integer number (7771877505).

Almost surely, 2^20725006678 is an apocalyptic number.

20725006678 is a deficient number, since it is larger than the sum of its proper divisors (10362503342).

20725006678 is a wasteful number, since it uses less digits than its factorization.

20725006678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10362503341.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 20725006678 in words is "twenty billion, seven hundred twenty-five million, six thousand, six hundred seventy-eight".