20723687241 has 16 divisors (see below), whose sum is σ = 28011110400. Its totient is φ = 13627098000.

The previous prime is 20723687221. The next prime is 20723687287. The reversal of 20723687241 is 14278632702.

It is a happy number.

It is not a de Polignac number, because 20723687241 - 2²⁶ = 20656578377 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20723687193 and 20723687202.

It is not an unprimeable number, because it can be changed into a prime (20723687221) 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 15 ways as a sum of consecutive naturals, for example, 56041 + ... + 211158.

It is an arithmetic number, because the mean of its divisors is an integer number (1750694400).

Almost surely, 2^20723687241 is an apocalyptic number.

It is an amenable number.

20723687241 is a deficient number, since it is larger than the sum of its proper divisors (7287423159).

20723687241 is a wasteful number, since it uses less digits than its factorization.

20723687241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267556.

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 20723687241 in words is "twenty billion, seven hundred twenty-three million, six hundred eighty-seven thousand, two hundred forty-one".