20705690019072 has 72 divisors (see below), whose sum is σ = 55652948598240. Its totient is φ = 6833561036800.

The previous prime is 20705690019071. The next prime is 20705690019073. The reversal of 20705690019072 is 27091009650702.

It is an interprime number because it is at equal distance from previous prime (20705690019071) and next prime (20705690019073).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705690019071) 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 7 ways as a sum of consecutive naturals, for example, 133390422 + ... + 133545557.

It is an arithmetic number, because the mean of its divisors is an integer number (772957619420).

Almost surely, 2^{20705690019072} is an apocalyptic number.

It is an amenable number.

20705690019072 is an abundant number, since it is smaller than the sum of its proper divisors (34947258579168).

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

20705690019072 is a wasteful number, since it uses less digits than its factorization.

20705690019072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266936099 (or 266936085 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 48.

Adding to 20705690019072 its reverse (27091009650702), we get a palindrome (47796699669774).

The spelling of 20705690019072 in words is "twenty trillion, seven hundred five billion, six hundred ninety million, nineteen thousand, seventy-two".