20525800078 has 16 divisors (see below), whose sum is σ = 35200940544. Its totient is φ = 8793307800.

The previous prime is 20525800069. The next prime is 20525800079. The reversal of 20525800078 is 87000852502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525800079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251650 + ... + 323077.

It is an arithmetic number, because the mean of its divisors is an integer number (2200058784).

Almost surely, 2^20525800078 is an apocalyptic number.

20525800078 is a deficient number, since it is larger than the sum of its proper divisors (14675140466).

20525800078 is a wasteful number, since it uses less digits than its factorization.

20525800078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577287.

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 20525800078 in words is "twenty billion, five hundred twenty-five million, eight hundred thousand, seventy-eight".