20451312220535 has 8 divisors (see below), whose sum is σ = 28047513902496. Its totient is φ = 14023756951200.

The previous prime is 20451312220499. The next prime is 20451312220571. The reversal of 20451312220535 is 53502221315402.

It is an interprime number because it is at equal distance from previous prime (20451312220499) and next prime (20451312220571).

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

It is not a de Polignac number, because 20451312220535 - 2⁸ = 20451312220279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 584323206301 = 20451312220535 / (2 + 0 + 4 + 5 + 1 + 3 + 1 + 2 + 2 + 2 + 0 + 5 + 3 + 5).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20451312220495 and 20451312220504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292161603116 + ... + 292161603185.

It is an arithmetic number, because the mean of its divisors is an integer number (3505939237812).

Almost surely, 2^{20451312220535} is an apocalyptic number.

20451312220535 is a deficient number, since it is larger than the sum of its proper divisors (7596201681961).

20451312220535 is an equidigital number, since it uses as much as digits as its factorization.

20451312220535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584323206313.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 20451312220535 its reverse (53502221315402), we get a palindrome (73953533535937).

The spelling of 20451312220535 in words is "twenty trillion, four hundred fifty-one billion, three hundred twelve million, two hundred twenty thousand, five hundred thirty-five".