20542100415 has 16 divisors (see below), whose sum is σ = 32894485728. Its totient is φ = 10946745216.

The previous prime is 20542100357. The next prime is 20542100419. The reversal of 20542100415 is 51400124502.

It is not a de Polignac number, because 20542100415 - 2⁶ = 20542100351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542100419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546304 + ... + 582693.

It is an arithmetic number, because the mean of its divisors is an integer number (2055905358).

Almost surely, 2^20542100415 is an apocalyptic number.

20542100415 is a deficient number, since it is larger than the sum of its proper divisors (12352385313).

20542100415 is a wasteful number, since it uses less digits than its factorization.

20542100415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130218.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 20542100415 its reverse (51400124502), we get a palindrome (71942224917).

The spelling of 20542100415 in words is "twenty billion, five hundred forty-two million, one hundred thousand, four hundred fifteen".