20682740894928 has 80 divisors (see below), whose sum is σ = 61063829569536. Its totient is φ = 5909306221440.

The previous prime is 20682740894927. The next prime is 20682740894939. The reversal of 20682740894928 is 82949804728602.

It is a super-2 number, since 2×20682740894928² (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 (20682740894927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70235325 + ... + 70529187.

Almost surely, 2^{20682740894928} is an apocalyptic number.

20682740894928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20682740894928 is an abundant number, since it is smaller than the sum of its proper divisors (40381088674608).

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

20682740894928 is a wasteful number, since it uses less digits than its factorization.

20682740894928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503352 (or 503346 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 69.

The spelling of 20682740894928 in words is "twenty trillion, six hundred eighty-two billion, seven hundred forty million, eight hundred ninety-four thousand, nine hundred twenty-eight".