20542033351511 has 12 divisors (see below), whose sum is σ = 24009085128600. Its totient is φ = 17524009485360.

The previous prime is 20542033351447. The next prime is 20542033351513. The reversal of 20542033351511 is 11515333024502.

It is a happy number.

It is not a de Polignac number, because 20542033351511 - 2⁶ = 20542033351447 is a prime.

It is a super-3 number, since 3×20542033351511³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542033351513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 993414236 + ... + 993434913.

It is an arithmetic number, because the mean of its divisors is an integer number (2000757094050).

Almost surely, 2^{20542033351511} is an apocalyptic number.

20542033351511 is a deficient number, since it is larger than the sum of its proper divisors (3467051777089).

20542033351511 is a wasteful number, since it uses less digits than its factorization.

20542033351511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986849374 (or 1986849367 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 20542033351511 in words is "twenty trillion, five hundred forty-two billion, thirty-three million, three hundred fifty-one thousand, five hundred eleven".