20205158451 has 4 divisors (see below), whose sum is σ = 26940211272. Its totient is φ = 13470105632.

The previous prime is 20205158437. The next prime is 20205158453. The reversal of 20205158451 is 15485150202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20205158451 - 2⁶ = 20205158387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20205158453) 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 3 ways as a sum of consecutive naturals, for example, 3367526406 + ... + 3367526411.

It is an arithmetic number, because the mean of its divisors is an integer number (6735052818).

Almost surely, 2^20205158451 is an apocalyptic number.

20205158451 is a deficient number, since it is larger than the sum of its proper divisors (6735052821).

20205158451 is an equidigital number, since it uses as much as digits as its factorization.

20205158451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735052820.

The product of its (nonzero) digits is 16000, while the sum is 33.

The spelling of 20205158451 in words is "twenty billion, two hundred five million, one hundred fifty-eight thousand, four hundred fifty-one".