20366144450 has 24 divisors (see below), whose sum is σ = 37971475920. Its totient is φ = 8127006800.

The previous prime is 20366144423. The next prime is 20366144453. The reversal of 20366144450 is 5444166302.

It is a self number, because there is not a number n which added to its sum of digits gives 20366144450.

It is not an unprimeable number, because it can be changed into a prime (20366144453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 465116 + ... + 507015.

It is an arithmetic number, because the mean of its divisors is an integer number (1582144830).

Almost surely, 2^20366144450 is an apocalyptic number.

20366144450 is a deficient number, since it is larger than the sum of its proper divisors (17605331470).

20366144450 is a wasteful number, since it uses less digits than its factorization.

20366144450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972562 (or 972557 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20366144450 in words is "twenty billion, three hundred sixty-six million, one hundred forty-four thousand, four hundred fifty".