20178064031 has 4 divisors (see below), whose sum is σ = 21365008992. Its totient is φ = 18991119072.

The previous prime is 20178064001. The next prime is 20178064033. The reversal of 20178064031 is 13046087102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13046087102 = 2 ⋅6523043551.

It is a cyclic number.

It is not a de Polignac number, because 20178064031 - 2¹⁰ = 20178063007 is a prime.

It is a super-2 number, since 2×20178064031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20178064033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593472455 + ... + 593472488.

It is an arithmetic number, because the mean of its divisors is an integer number (5341252248).

Almost surely, 2^20178064031 is an apocalyptic number.

20178064031 is a deficient number, since it is larger than the sum of its proper divisors (1186944961).

20178064031 is a wasteful number, since it uses less digits than its factorization.

20178064031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186944960.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 20178064031 in words is "twenty billion, one hundred seventy-eight million, sixty-four thousand, thirty-one".