202021092 has 72 divisors (see below), whose sum is σ = 628520256. Its totient is φ = 53279424.

The previous prime is 202021049. The next prime is 202021097. The reversal of 202021092 is 290120202.

It is a super-2 number, since 2×202021092² = 81625043225744928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (202021097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27558 + ... + 34109.

It is an arithmetic number, because the mean of its divisors is an integer number (8729448).

Almost surely, 2^202021092 is an apocalyptic number.

It is an amenable number.

202021092 is an abundant number, since it is smaller than the sum of its proper divisors (426499164).

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

202021092 is a wasteful number, since it uses less digits than its factorization.

202021092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61697 (or 61692 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 202021092 is about 14213.4123981541. The cubic root of 202021092 is about 586.7668520076.

Adding to 202021092 its reverse (290120202), we get a palindrome (492141294).

The spelling of 202021092 in words is "two hundred two million, twenty-one thousand, ninety-two".