20453211512451 has 16 divisors (see below), whose sum is σ = 30453320704000. Its totient is φ = 13566954366504.

The previous prime is 20453211512413. The next prime is 20453211512477. The reversal of 20453211512451 is 15421511235402.

20453211512451 is a `hidden beast` number, since 2 + 0 + 4 + 53 + 2 + 1 + 151 + 2 + 451 = 666.

It is not a de Polignac number, because 20453211512451 - 2¹³ = 20453211504259 is a prime.

It is a super-2 number, since 2×20453211512451² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20453211512651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1903327171 + ... + 1903337916.

It is an arithmetic number, because the mean of its divisors is an integer number (1903332544000).

Almost surely, 2^{20453211512451} is an apocalyptic number.

20453211512451 is a deficient number, since it is larger than the sum of its proper divisors (10000109191549).

20453211512451 is a wasteful number, since it uses less digits than its factorization.

20453211512451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806665295 (or 3806665289 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 20453211512451 its reverse (15421511235402), we get a palindrome (35874722747853).

The spelling of 20453211512451 in words is "twenty trillion, four hundred fifty-three billion, two hundred eleven million, five hundred twelve thousand, four hundred fifty-one".