20351654603444 has 12 divisors (see below), whose sum is σ = 36577973814564. Its totient is φ = 9900804942144.

The previous prime is 20351654603443. The next prime is 20351654603537. The reversal of 20351654603444 is 44430645615302.

20351654603444 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8755314087844 + 11596340515600 = 2958938^2 + 3405340^2 .

It is a super-2 number, since 2×20351654603444² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351654603443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68755589729 + ... + 68755590024.

It is an arithmetic number, because the mean of its divisors is an integer number (3048164484547).

Almost surely, 2^{20351654603444} is an apocalyptic number.

It is an amenable number.

20351654603444 is a deficient number, since it is larger than the sum of its proper divisors (16226319211120).

20351654603444 is a wasteful number, since it uses less digits than its factorization.

20351654603444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137511179794 (or 137511179792 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 20351654603444 in words is "twenty trillion, three hundred fifty-one billion, six hundred fifty-four million, six hundred three thousand, four hundred forty-four".