2021623254 has 24 divisors (see below), whose sum is σ = 5005924560. Its totient is φ = 577606608.

The previous prime is 2021623231. The next prime is 2021623271. The reversal of 2021623254 is 4523261202.

It is a happy number.

It is a super-2 number, since 2×2021623254² = 8173921162227097032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8022189 + ... + 8022440.

It is an arithmetic number, because the mean of its divisors is an integer number (208580190).

Almost surely, 2^2021623254 is an apocalyptic number.

2021623254 is an abundant number, since it is smaller than the sum of its proper divisors (2984301306).

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

2021623254 is a wasteful number, since it uses less digits than its factorization.

2021623254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16044644 (or 16044641 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2021623254 is about 44962.4649457745. The cubic root of 2021623254 is about 1264.4453825403.

Adding to 2021623254 its reverse (4523261202), we get a palindrome (6544884456).

The spelling of 2021623254 in words is "two billion, twenty-one million, six hundred twenty-three thousand, two hundred fifty-four".