20673324251 has 8 divisors (see below), whose sum is σ = 21056868864. Its totient is φ = 20292345640.

The previous prime is 20673324247. The next prime is 20673324277. The reversal of 20673324251 is 15242337602.

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

It is a cyclic number.

It is not a de Polignac number, because 20673324251 - 2² = 20673324247 is a prime.

It is a super-2 number, since 2×20673324251² (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 (20673524251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625235 + ... + 657468.

It is an arithmetic number, because the mean of its divisors is an integer number (2632108608).

Almost surely, 2^20673324251 is an apocalyptic number.

20673324251 is a deficient number, since it is larger than the sum of its proper divisors (383544613).

20673324251 is a wasteful number, since it uses less digits than its factorization.

20673324251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283001.

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 20673324251 in words is "twenty billion, six hundred seventy-three million, three hundred twenty-four thousand, two hundred fifty-one".