20277724397 has 8 divisors (see below), whose sum is σ = 23176032576. Its totient is φ = 17379788832.

The previous prime is 20277724391. The next prime is 20277724409. The reversal of 20277724397 is 79342777202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20277724397 - 2⁴ = 20277724381 is a prime.

It is a super-2 number, since 2×20277724397² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20277724391) 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 7 ways as a sum of consecutive naturals, for example, 35273 + ... + 204449.

It is an arithmetic number, because the mean of its divisors is an integer number (2897004072).

Almost surely, 2^20277724397 is an apocalyptic number.

It is an amenable number.

20277724397 is a deficient number, since it is larger than the sum of its proper divisors (2898308179).

20277724397 is a wasteful number, since it uses less digits than its factorization.

20277724397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186307.

The product of its (nonzero) digits is 2074464, while the sum is 50.

The spelling of 20277724397 in words is "twenty billion, two hundred seventy-seven million, seven hundred twenty-four thousand, three hundred ninety-seven".