20145633423 has 16 divisors (see below), whose sum is σ = 28107327456. Its totient is φ = 12820878720.

The previous prime is 20145633419. The next prime is 20145633439. The reversal of 20145633423 is 32433654102.

It is a happy number.

It is not a de Polignac number, because 20145633423 - 2² = 20145633419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145633523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1706308 + ... + 1718073.

It is an arithmetic number, because the mean of its divisors is an integer number (1756707966).

Almost surely, 2^20145633423 is an apocalyptic number.

20145633423 is a deficient number, since it is larger than the sum of its proper divisors (7961694033).

20145633423 is a wasteful number, since it uses less digits than its factorization.

20145633423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424474.

The product of its (nonzero) digits is 51840, while the sum is 33.

The spelling of 20145633423 in words is "twenty billion, one hundred forty-five million, six hundred thirty-three thousand, four hundred twenty-three".