20906748375 has 16 divisors (see below), whose sum is σ = 34788829920. Its totient is φ = 11150265600.

The previous prime is 20906748371. The next prime is 20906748377. The reversal of 20906748375 is 57384760902.

It is not a de Polignac number, because 20906748375 - 2² = 20906748371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20906748371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27875290 + ... + 27876039.

It is an arithmetic number, because the mean of its divisors is an integer number (2174301870).

Almost surely, 2^20906748375 is an apocalyptic number.

20906748375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20906748375 is a deficient number, since it is larger than the sum of its proper divisors (13882081545).

20906748375 is an equidigital number, since it uses as much as digits as its factorization.

20906748375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55751347 (or 55751337 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 20906748375 in words is "twenty billion, nine hundred six million, seven hundred forty-eight thousand, three hundred seventy-five".