20734160247 has 20 divisors (see below), whose sum is σ = 32041298520. Its totient is φ = 13346124624.

The previous prime is 20734160173. The next prime is 20734160261. The reversal of 20734160247 is 74206143702.

20734160247 is a `hidden beast` number, since 2 + 0 + 7 + 3 + 4 + 1 + 602 + 47 = 666.

It is not a de Polignac number, because 20734160247 - 2⁷ = 20734160119 is a prime.

It is a super-2 number, since 2×20734160247² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734160297) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4411053 + ... + 4415750.

It is an arithmetic number, because the mean of its divisors is an integer number (1602064926).

Almost surely, 2^20734160247 is an apocalyptic number.

20734160247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20734160247 is a deficient number, since it is larger than the sum of its proper divisors (11307138273).

20734160247 is an equidigital number, since it uses as much as digits as its factorization.

20734160247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8826844 (or 8826835 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 20734160247 in words is "twenty billion, seven hundred thirty-four million, one hundred sixty thousand, two hundred forty-seven".