20670540386742 has 12 divisors (see below), whose sum is σ = 44786170837980. Its totient is φ = 6890180128908.

The previous prime is 20670540386737. The next prime is 20670540386747. The reversal of 20670540386742 is 24768304507602.

20670540386742 is a `hidden beast` number, since 2 + 0 + 6 + 7 + 0 + 540 + 38 + 67 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20670540386737) and next prime (20670540386747).

It is a super-2 number, since 2×20670540386742² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670540386747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 574181677392 + ... + 574181677427.

It is an arithmetic number, because the mean of its divisors is an integer number (3732180903165).

Almost surely, 2^{20670540386742} is an apocalyptic number.

20670540386742 is an abundant number, since it is smaller than the sum of its proper divisors (24115630451238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20670540386742 is a wasteful number, since it uses less digits than its factorization.

20670540386742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148363354827 (or 1148363354824 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 54.

The spelling of 20670540386742 in words is "twenty trillion, six hundred seventy billion, five hundred forty million, three hundred eighty-six thousand, seven hundred forty-two".