20542011015 has 16 divisors (see below), whose sum is σ = 32869094400. Its totient is φ = 10955113632.

The previous prime is 20542011001. The next prime is 20542011037. The reversal of 20542011015 is 51011024502.

It is not a de Polignac number, because 20542011015 - 2¹⁹ = 20541486727 is a prime.

It is a super-3 number, since 3×20542011015³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20542010982 and 20542011000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371326 + ... + 423044.

It is an arithmetic number, because the mean of its divisors is an integer number (2054318400).

Almost surely, 2^20542011015 is an apocalyptic number.

20542011015 is a deficient number, since it is larger than the sum of its proper divisors (12327083385).

20542011015 is a wasteful number, since it uses less digits than its factorization.

20542011015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78206.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 20542011015 its reverse (51011024502), we get a palindrome (71553035517).

The spelling of 20542011015 in words is "twenty billion, five hundred forty-two million, eleven thousand, fifteen".