20511215063042 has 16 divisors (see below), whose sum is σ = 34470936372672. Its totient is φ = 9071299044720.

The previous prime is 20511215063041. The next prime is 20511215063051. The reversal of 20511215063042 is 24036051211502.

It is a super-3 number, since 3×20511215063042³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20511215063041) 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, 12599025638 + ... + 12599027265.

It is an arithmetic number, because the mean of its divisors is an integer number (2154433523292).

Almost surely, 2^{20511215063042} is an apocalyptic number.

20511215063042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20511215063042 is a deficient number, since it is larger than the sum of its proper divisors (13959721309630).

20511215063042 is a wasteful number, since it uses less digits than its factorization.

20511215063042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25198052953.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 20511215063042 its reverse (24036051211502), we get a palindrome (44547266274544).

The spelling of 20511215063042 in words is "twenty trillion, five hundred eleven billion, two hundred fifteen million, sixty-three thousand, forty-two".