20637493471 has 16 divisors (see below), whose sum is σ = 23795634240. Its totient is φ = 17532403200.

The previous prime is 20637493469. The next prime is 20637493483. The reversal of 20637493471 is 17439473602.

It is a cyclic number.

It is not a de Polignac number, because 20637493471 - 2¹ = 20637493469 is a prime.

It is a super-3 number, since 3×20637493471³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20637493411) 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 15 ways as a sum of consecutive naturals, for example, 417285 + ... + 464113.

It is an arithmetic number, because the mean of its divisors is an integer number (1487227140).

Almost surely, 2^20637493471 is an apocalyptic number.

20637493471 is a deficient number, since it is larger than the sum of its proper divisors (3158140769).

20637493471 is a wasteful number, since it uses less digits than its factorization.

20637493471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47394.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 20637493471 in words is "twenty billion, six hundred thirty-seven million, four hundred ninety-three thousand, four hundred seventy-one".