20020073257 has 8 divisors (see below), whose sum is σ = 21039324416. Its totient is φ = 19025988912.

The previous prime is 20020073251. The next prime is 20020073261. The reversal of 20020073257 is 75237002002.

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 20020073257 - 2¹¹ = 20020071209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020073251) 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, 6290073 + ... + 6293254.

It is an arithmetic number, because the mean of its divisors is an integer number (2629915552).

Almost surely, 2^20020073257 is an apocalyptic number.

It is an amenable number.

20020073257 is a deficient number, since it is larger than the sum of its proper divisors (1019251159).

20020073257 is a wasteful number, since it uses less digits than its factorization.

20020073257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12583407.

The product of its (nonzero) digits is 5880, while the sum is 28.

Adding to 20020073257 its reverse (75237002002), we get a palindrome (95257075259).

The spelling of 20020073257 in words is "twenty billion, twenty million, seventy-three thousand, two hundred fifty-seven".