20351345315553 has 24 divisors (see below), whose sum is σ = 33837568564800. Its totient is φ = 11545675857504.

The previous prime is 20351345315513. The next prime is 20351345315557. The reversal of 20351345315553 is 35551354315302.

20351345315553 is a `hidden beast` number, since 2 + 0 + 3 + 5 + 1 + 34 + 53 + 15 + 553 = 666.

It is not a de Polignac number, because 20351345315553 - 2¹³ = 20351345307361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20351345315499 and 20351345315508.

It is not an unprimeable number, because it can be changed into a prime (20351345315557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1161995658 + ... + 1162013171.

It is an arithmetic number, because the mean of its divisors is an integer number (1409898690200).

Almost surely, 2^{20351345315553} is an apocalyptic number.

It is an amenable number.

20351345315553 is a deficient number, since it is larger than the sum of its proper divisors (13486223249247).

20351345315553 is a wasteful number, since it uses less digits than its factorization.

20351345315553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324008981 (or 2324008978 counting only the distinct ones).

The product of its (nonzero) digits is 2025000, while the sum is 45.

The spelling of 20351345315553 in words is "twenty trillion, three hundred fifty-one billion, three hundred forty-five million, three hundred fifteen thousand, five hundred fifty-three".