20275178936 has 8 divisors (see below), whose sum is σ = 38015960520. Its totient is φ = 10137589464.

The previous prime is 20275178897. The next prime is 20275178947. The reversal of 20275178936 is 63987157202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20275178936² (a number of 21 digits) contains 22 as substring.

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, 1267198676 + ... + 1267198691.

It is an arithmetic number, because the mean of its divisors is an integer number (4751995065).

Almost surely, 2^20275178936 is an apocalyptic number.

It is an amenable number.

20275178936 is a deficient number, since it is larger than the sum of its proper divisors (17740781584).

20275178936 is a wasteful number, since it uses less digits than its factorization.

20275178936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534397373 (or 2534397369 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 20275178936 in words is "twenty billion, two hundred seventy-five million, one hundred seventy-eight thousand, nine hundred thirty-six".