20145436465 has 32 divisors (see below), whose sum is σ = 30192963840. Its totient is φ = 12535987200.

The previous prime is 20145436463. The next prime is 20145436483. The reversal of 20145436465 is 56463454102.

It is not a de Polignac number, because 20145436465 - 2¹ = 20145436463 is a prime.

It is a super-2 number, since 2×20145436465² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20145436463) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 173085 + ... + 265045.

It is an arithmetic number, because the mean of its divisors is an integer number (943530120).

Almost surely, 2^20145436465 is an apocalyptic number.

It is an amenable number.

20145436465 is a deficient number, since it is larger than the sum of its proper divisors (10047527375).

20145436465 is a wasteful number, since it uses less digits than its factorization.

20145436465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92553.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20145436465 in words is "twenty billion, one hundred forty-five million, four hundred thirty-six thousand, four hundred sixty-five".