20787973270749 has 24 divisors (see below), whose sum is σ = 30046275692160. Its totient is φ = 13849788601152.

The previous prime is 20787973270739. The next prime is 20787973270759. The reversal of 20787973270749 is 94707237978702.

20787973270749 is a `hidden beast` number, since 207 + 8 + 7 + 97 + 327 + 0 + 7 + 4 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (20787973270739) and next prime (20787973270759).

It is not a de Polignac number, because 20787973270749 - 2⁷ = 20787973270621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20787973270739) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92756622 + ... + 92980464.

It is an arithmetic number, because the mean of its divisors is an integer number (1251928153840).

Almost surely, 2^{20787973270749} is an apocalyptic number.

It is an amenable number.

20787973270749 is a deficient number, since it is larger than the sum of its proper divisors (9258302421411).

20787973270749 is a wasteful number, since it uses less digits than its factorization.

20787973270749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230401 (or 230398 counting only the distinct ones).

The product of its (nonzero) digits is 522764928, while the sum is 72.

The spelling of 20787973270749 in words is "twenty trillion, seven hundred eighty-seven billion, nine hundred seventy-three million, two hundred seventy thousand, seven hundred forty-nine".