20402632465 has 8 divisors (see below), whose sum is σ = 24485883048. Its totient is φ = 16320289920.

The previous prime is 20402632451. The next prime is 20402632469. The reversal of 20402632465 is 56423620402.

It can be written as a sum of positive squares in 4 ways, for example, as 172975104 + 20229657361 = 13152^2 + 142231^2 .

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

It is not a de Polignac number, because 20402632465 - 2¹⁵ = 20402599697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402632465.

It is not an unprimeable number, because it can be changed into a prime (20402632469) 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, 176556 + ... + 268285.

It is an arithmetic number, because the mean of its divisors is an integer number (3060735381).

Almost surely, 2^20402632465 is an apocalyptic number.

It is an amenable number.

20402632465 is a deficient number, since it is larger than the sum of its proper divisors (4083250583).

20402632465 is an equidigital number, since it uses as much as digits as its factorization.

20402632465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454019.

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 20402632465 in words is "twenty billion, four hundred two million, six hundred thirty-two thousand, four hundred sixty-five".