20291234731 has 8 divisors (see below), whose sum is σ = 22418960544. Its totient is φ = 18267300480.

The previous prime is 20291234707. The next prime is 20291234741. The reversal of 20291234731 is 13743219202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20291234731 - 2¹⁵ = 20291201963 is a prime.

It is a super-2 number, since 2×20291234731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20291234741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25947480 + ... + 25948261.

It is an arithmetic number, because the mean of its divisors is an integer number (2802370068).

Almost surely, 2^20291234731 is an apocalyptic number.

20291234731 is a deficient number, since it is larger than the sum of its proper divisors (2127725813).

20291234731 is a wasteful number, since it uses less digits than its factorization.

20291234731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51895781.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 20291234731 in words is "twenty billion, two hundred ninety-one million, two hundred thirty-four thousand, seven hundred thirty-one".