20145434401 has 8 divisors (see below), whose sum is σ = 21333317544. Its totient is φ = 18957868800.

The previous prime is 20145434359. The next prime is 20145434411. The reversal of 20145434401 is 10443454102.

It can be written as a sum of positive squares in 4 ways, for example, as 2222651025 + 17922783376 = 47145^2 + 133876^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20145434401 - 2⁷ = 20145434273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20145434401.

It is not an unprimeable number, because it can be changed into a prime (20145434411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58051 + ... + 208951.

It is an arithmetic number, because the mean of its divisors is an integer number (2666664693).

Almost surely, 2^20145434401 is an apocalyptic number.

It is an amenable number.

20145434401 is a deficient number, since it is larger than the sum of its proper divisors (1187883143).

20145434401 is a wasteful number, since it uses less digits than its factorization.

20145434401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158771.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 20145434401 its reverse (10443454102), we get a palindrome (30588888503).

The spelling of 20145434401 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, four hundred one".