20274571651 has 4 divisors (see below), whose sum is σ = 20275093432. Its totient is φ = 20274049872.

The previous prime is 20274571621. The next prime is 20274571673. The reversal of 20274571651 is 15617547202.

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 20274571651 - 2⁵ = 20274571619 is a prime.

It is a super-2 number, since 2×20274571651² (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 (20274571621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197466 + ... + 282031.

It is an arithmetic number, because the mean of its divisors is an integer number (5068773358).

Almost surely, 2^20274571651 is an apocalyptic number.

20274571651 is a deficient number, since it is larger than the sum of its proper divisors (521781).

20274571651 is an equidigital number, since it uses as much as digits as its factorization.

20274571651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521780.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 20274571651 in words is "twenty billion, two hundred seventy-four million, five hundred seventy-one thousand, six hundred fifty-one".