20678234279 has 16 divisors (see below), whose sum is σ = 21306355200. Its totient is φ = 20062126656.

The previous prime is 20678234251. The next prime is 20678234309. The reversal of 20678234279 is 97243287602.

It is a cyclic number.

It is not a de Polignac number, because 20678234279 - 2¹⁶ = 20678168743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20678234209) 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, 1137032 + ... + 1155074.

It is an arithmetic number, because the mean of its divisors is an integer number (1331647200).

Almost surely, 2^20678234279 is an apocalyptic number.

20678234279 is a deficient number, since it is larger than the sum of its proper divisors (628120921).

20678234279 is a wasteful number, since it uses less digits than its factorization.

20678234279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18374.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 20678234279 in words is "twenty billion, six hundred seventy-eight million, two hundred thirty-four thousand, two hundred seventy-nine".