20542305511 has 8 divisors (see below), whose sum is σ = 25282837664. Its totient is φ = 16253252640.

The previous prime is 20542305473. The next prime is 20542305523. The reversal of 20542305511 is 11550324502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20542305511 - 2⁷ = 20542305383 is a prime.

It is a super-2 number, since 2×20542305511² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20542305511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542305211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112869720 + ... + 112869901.

It is an arithmetic number, because the mean of its divisors is an integer number (3160354708).

Almost surely, 2^20542305511 is an apocalyptic number.

20542305511 is a deficient number, since it is larger than the sum of its proper divisors (4740532153).

20542305511 is a wasteful number, since it uses less digits than its factorization.

20542305511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225739641.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20542305511 in words is "twenty billion, five hundred forty-two million, three hundred five thousand, five hundred eleven".