20146635073478 has 32 divisors (see below), whose sum is σ = 30892013881344. Its totient is φ = 9849703773312.

The previous prime is 20146635073471. The next prime is 20146635073519. The reversal of 20146635073478 is 87437053664102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146635073471) 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, 1004960051 + ... + 1004980097.

It is an arithmetic number, because the mean of its divisors is an integer number (965375433792).

Almost surely, 2^{20146635073478} is an apocalyptic number.

20146635073478 is a deficient number, since it is larger than the sum of its proper divisors (10745378807866).

20146635073478 is a wasteful number, since it uses less digits than its factorization.

20146635073478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29636.

The product of its (nonzero) digits is 20321280, while the sum is 56.

The spelling of 20146635073478 in words is "twenty trillion, one hundred forty-six billion, six hundred thirty-five million, seventy-three thousand, four hundred seventy-eight".