20273215451 has 4 divisors (see below), whose sum is σ = 20274835392. Its totient is φ = 20271595512.

The previous prime is 20273215409. The next prime is 20273215463. The reversal of 20273215451 is 15451237202.

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 20273215451 - 2¹⁰ = 20273214427 is a prime.

It is a super-2 number, since 2×20273215451² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20273215481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791051 + ... + 816276.

It is an arithmetic number, because the mean of its divisors is an integer number (5068708848).

Almost surely, 2^20273215451 is an apocalyptic number.

20273215451 is a deficient number, since it is larger than the sum of its proper divisors (1619941).

20273215451 is a wasteful number, since it uses less digits than its factorization.

20273215451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619940.

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 20273215451 in words is "twenty billion, two hundred seventy-three million, two hundred fifteen thousand, four hundred fifty-one".