20722157115507 has 24 divisors (see below), whose sum is σ = 30541411193904. Its totient is φ = 13534270161984.

The previous prime is 20722157115383. The next prime is 20722157115623. The reversal of 20722157115507 is 70551175122702.

20722157115507 is a `hidden beast` number, since 2 + 0 + 7 + 2 + 21 + 5 + 7 + 115 + 507 = 666.

It is not a de Polignac number, because 20722157115507 - 2⁴³ = 11926064093299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20722157125507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31477048 + ... + 32128629.

It is an arithmetic number, because the mean of its divisors is an integer number (1272558799746).

Almost surely, 2^{20722157115507} is an apocalyptic number.

20722157115507 is a deficient number, since it is larger than the sum of its proper divisors (9819254078397).

20722157115507 is a wasteful number, since it uses less digits than its factorization.

20722157115507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63606419 (or 63606416 counting only the distinct ones).

The product of its (nonzero) digits is 343000, while the sum is 45.

The spelling of 20722157115507 in words is "twenty trillion, seven hundred twenty-two billion, one hundred fifty-seven million, one hundred fifteen thousand, five hundred seven".