20542254102 has 16 divisors (see below), whose sum is σ = 45649453680. Its totient is φ = 6847418016.

The previous prime is 20542254097. The next prime is 20542254121. The reversal of 20542254102 is 20145224502.

20542254102 is a `hidden beast` number, since 20 + 5 + 4 + 225 + 410 + 2 = 666.

20542254102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×20542254102² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190206003 + ... + 190206110.

It is an arithmetic number, because the mean of its divisors is an integer number (2853090855).

Almost surely, 2^20542254102 is an apocalyptic number.

20542254102 is an abundant number, since it is smaller than the sum of its proper divisors (25107199578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20542254102 is a wasteful number, since it uses less digits than its factorization.

20542254102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380412124 (or 380412118 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 20542254102 its reverse (20145224502), we get a palindrome (40687478604).

The spelling of 20542254102 in words is "twenty billion, five hundred forty-two million, two hundred fifty-four thousand, one hundred two".