20476640743 has 16 divisors (see below), whose sum is σ = 23431506336. Its totient is φ = 17726745600.

The previous prime is 20476640741. The next prime is 20476640759. The reversal of 20476640743 is 34704667402.

It is a cyclic number.

It is not a de Polignac number, because 20476640743 - 2¹ = 20476640741 is a prime.

It is a super-2 number, since 2×20476640743² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20476640743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20476640741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101158 + ... + 226243.

It is an arithmetic number, because the mean of its divisors is an integer number (1464469146).

Almost surely, 2^20476640743 is an apocalyptic number.

20476640743 is a deficient number, since it is larger than the sum of its proper divisors (2954865593).

20476640743 is a wasteful number, since it uses less digits than its factorization.

20476640743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327714.

The product of its (nonzero) digits is 677376, while the sum is 43.

The spelling of 20476640743 in words is "twenty billion, four hundred seventy-six million, six hundred forty thousand, seven hundred forty-three".