20178395134 has 16 divisors (see below), whose sum is σ = 30310793568. Its totient is φ = 10074810592.

The previous prime is 20178395131. The next prime is 20178395173. The reversal of 20178395134 is 43159387102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20178395131) 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, 7111164 + ... + 7114000.

It is an arithmetic number, because the mean of its divisors is an integer number (1894424598).

Almost surely, 2^20178395134 is an apocalyptic number.

20178395134 is a deficient number, since it is larger than the sum of its proper divisors (10132398434).

20178395134 is a wasteful number, since it uses less digits than its factorization.

20178395134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 20178395134 in words is "twenty billion, one hundred seventy-eight million, three hundred ninety-five thousand, one hundred thirty-four".