20860715738 has 4 divisors (see below), whose sum is σ = 31291073610. Its totient is φ = 10430357868.

The previous prime is 20860715731. The next prime is 20860715761. The reversal of 20860715738 is 83751706802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83751706802 = 2 ⋅41875853401.

It can be written as a sum of positive squares in only one way, i.e., 16430881489 + 4429834249 = 128183^2 + 66557^2 .

It is a super-2 number, since 2×20860715738² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20860715692 and 20860715701.

It is not an unprimeable number, because it can be changed into a prime (20860715731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5215178933 + ... + 5215178936.

Almost surely, 2^20860715738 is an apocalyptic number.

20860715738 is a deficient number, since it is larger than the sum of its proper divisors (10430357872).

20860715738 is a wasteful number, since it uses less digits than its factorization.

20860715738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10430357871.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 20860715738 in words is "twenty billion, eight hundred sixty million, seven hundred fifteen thousand, seven hundred thirty-eight".