20606402144 has 24 divisors (see below), whose sum is σ = 42332718960. Its totient is φ = 9855235456.

The previous prime is 20606402137. The next prime is 20606402153. The reversal of 20606402144 is 44120460602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13998179 + ... + 13999650.

It is an arithmetic number, because the mean of its divisors is an integer number (1763863290).

Almost surely, 2^20606402144 is an apocalyptic number.

It is an amenable number.

20606402144 is an abundant number, since it is smaller than the sum of its proper divisors (21726316816).

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

20606402144 is a wasteful number, since it uses less digits than its factorization.

20606402144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27997862 (or 27997854 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 20606402144 its reverse (44120460602), we get a palindrome (64726862746).

The spelling of 20606402144 in words is "twenty billion, six hundred six million, four hundred two thousand, one hundred forty-four".