20535323451 has 16 divisors (see below), whose sum is σ = 29111357088. Its totient is φ = 12831436800.

The previous prime is 20535323441. The next prime is 20535323453. The reversal of 20535323451 is 15432353502.

It is not a de Polignac number, because 20535323451 - 2⁶ = 20535323387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20535323453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823090 + ... + 847671.

It is an arithmetic number, because the mean of its divisors is an integer number (1819459818).

Almost surely, 2^20535323451 is an apocalyptic number.

20535323451 is a deficient number, since it is larger than the sum of its proper divisors (8576033637).

20535323451 is a wasteful number, since it uses less digits than its factorization.

20535323451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671022.

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 20535323451 its reverse (15432353502), we get a palindrome (35967676953).

The spelling of 20535323451 in words is "twenty billion, five hundred thirty-five million, three hundred twenty-three thousand, four hundred fifty-one".