20925566078 has 8 divisors (see below), whose sum is σ = 31580916168. Its totient is φ = 10398594024.

The previous prime is 20925566009. The next prime is 20925566107. The reversal of 20925566078 is 87066552902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32094101 + ... + 32094752.

It is an arithmetic number, because the mean of its divisors is an integer number (3947614521).

Almost surely, 2^20925566078 is an apocalyptic number.

20925566078 is a deficient number, since it is larger than the sum of its proper divisors (10655350090).

20925566078 is a wasteful number, since it uses less digits than its factorization.

20925566078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64189018.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 20925566078 in words is "twenty billion, nine hundred twenty-five million, five hundred sixty-six thousand, seventy-eight".