20829142878806 has 16 divisors (see below), whose sum is σ = 31535337873600. Its totient is φ = 10317393793728.

The previous prime is 20829142878799. The next prime is 20829142878811. The reversal of 20829142878806 is 60887824192802.

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, 6168590 + ... + 8928033.

It is an arithmetic number, because the mean of its divisors is an integer number (1970958617100).

Almost surely, 2^{20829142878806} is an apocalyptic number.

20829142878806 is a deficient number, since it is larger than the sum of its proper divisors (10706194994794).

20829142878806 is a wasteful number, since it uses less digits than its factorization.

20829142878806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15103063.

The product of its (nonzero) digits is 49545216, while the sum is 65.

The spelling of 20829142878806 in words is "twenty trillion, eight hundred twenty-nine billion, one hundred forty-two million, eight hundred seventy-eight thousand, eight hundred six".