20629897184 has 48 divisors (see below), whose sum is σ = 44806199760. Its totient is φ = 9289251840.

The previous prime is 20629897117. The next prime is 20629897213. The reversal of 20629897184 is 48179892602.

It is a super-2 number, since 2×20629897184² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 587714 + ... + 621825.

It is an arithmetic number, because the mean of its divisors is an integer number (933462495).

Almost surely, 2^20629897184 is an apocalyptic number.

It is an amenable number.

20629897184 is an abundant number, since it is smaller than the sum of its proper divisors (24176302576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20629897184 is a wasteful number, since it uses less digits than its factorization.

20629897184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209603 (or 1209595 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 20629897184 in words is "twenty billion, six hundred twenty-nine million, eight hundred ninety-seven thousand, one hundred eighty-four".