2257421020 has 24 divisors (see below), whose sum is σ = 4946697504. Its totient is φ = 863708736.

The previous prime is 2257420999. The next prime is 2257421029. The reversal of 2257421020 is 201247522.

It is a super-3 number, since 3×2257421020³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257421029) 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, 2453259 + ... + 2454178.

It is an arithmetic number, because the mean of its divisors is an integer number (206112396).

Almost surely, 2^2257421020 is an apocalyptic number.

2257421020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2257421020 is an abundant number, since it is smaller than the sum of its proper divisors (2689276484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2257421020 is a wasteful number, since it uses less digits than its factorization.

2257421020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907469 (or 4907467 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 2257421020 is about 47512.3249273281. The cubic root of 2257421020 is about 1311.8097512845.

Adding to 2257421020 its reverse (201247522), we get a palindrome (2458668542).

The spelling of 2257421020 in words is "two billion, two hundred fifty-seven million, four hundred twenty-one thousand, twenty".