20758492834 has 4 divisors (see below), whose sum is σ = 31137739254. Its totient is φ = 10379246416.

The previous prime is 20758492801. The next prime is 20758492837. The reversal of 20758492834 is 43829485702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43829485702 = 2 ⋅21914742851.

It can be written as a sum of positive squares in only one way, i.e., 19355765625 + 1402727209 = 139125^2 + 37453^2 .

It is not an unprimeable number, because it can be changed into a prime (20758492837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5189623207 + ... + 5189623210.

Almost surely, 2^20758492834 is an apocalyptic number.

20758492834 is a deficient number, since it is larger than the sum of its proper divisors (10379246420).

20758492834 is a wasteful number, since it uses less digits than its factorization.

20758492834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10379246419.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 20758492834 in words is "twenty billion, seven hundred fifty-eight million, four hundred ninety-two thousand, eight hundred thirty-four".