20767252541 has 4 divisors (see below), whose sum is σ = 23734002912. Its totient is φ = 17800502172.

The previous prime is 20767252511. The next prime is 20767252559. The reversal of 20767252541 is 14525276702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20767252541 - 2¹⁸ = 20766990397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20767252511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1483375175 + ... + 1483375188.

It is an arithmetic number, because the mean of its divisors is an integer number (5933500728).

Almost surely, 2^20767252541 is an apocalyptic number.

It is an amenable number.

20767252541 is a deficient number, since it is larger than the sum of its proper divisors (2966750371).

20767252541 is an equidigital number, since it uses as much as digits as its factorization.

20767252541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966750370.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 20767252541 in words is "twenty billion, seven hundred sixty-seven million, two hundred fifty-two thousand, five hundred forty-one".