20671125775 has 24 divisors (see below), whose sum is σ = 27873506160. Its totient is φ = 15143477760.

The previous prime is 20671125767. The next prime is 20671125781. The reversal of 20671125775 is 57752117602.

It is not a de Polignac number, because 20671125775 - 2³ = 20671125767 is a prime.

It is a super-3 number, since 3×20671125775³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 641545 + ... + 672994.

It is an arithmetic number, because the mean of its divisors is an integer number (1161396090).

Almost surely, 2^20671125775 is an apocalyptic number.

20671125775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20671125775 is a deficient number, since it is larger than the sum of its proper divisors (7202380385).

20671125775 is a wasteful number, since it uses less digits than its factorization.

20671125775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314603 (or 1314598 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 43.

The spelling of 20671125775 in words is "twenty billion, six hundred seventy-one million, one hundred twenty-five thousand, seven hundred seventy-five".