20606172748 has 24 divisors (see below), whose sum is σ = 41229773312. Its totient is φ = 8827482384.

The previous prime is 20606172721. The next prime is 20606172751. The reversal of 20606172748 is 84727160602.

It is a super-2 number, since 2×20606172748² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87690 + ... + 221137.

Almost surely, 2^20606172748 is an apocalyptic number.

20606172748 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20606172748 is an abundant number, since it is smaller than the sum of its proper divisors (20623600564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20606172748 is a wasteful number, since it uses less digits than its factorization.

20606172748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311221 (or 311219 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 20606172748 in words is "twenty billion, six hundred six million, one hundred seventy-two thousand, seven hundred forty-eight".