20542100394 has 16 divisors (see below), whose sum is σ = 41407699968. Its totient is φ = 6793450272.

The previous prime is 20542100357. The next prime is 20542100419. The reversal of 20542100394 is 49300124502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13478307 + ... + 13479830.

It is an arithmetic number, because the mean of its divisors is an integer number (2587981248).

Almost surely, 2^20542100394 is an apocalyptic number.

20542100394 is an abundant number, since it is smaller than the sum of its proper divisors (20865599574).

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

20542100394 is a wasteful number, since it uses less digits than its factorization.

20542100394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26958269.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 20542100394 its reverse (49300124502), we get a palindrome (69842224896).

The spelling of 20542100394 in words is "twenty billion, five hundred forty-two million, one hundred thousand, three hundred ninety-four".