2021432023 has 4 divisors (see below), whose sum is σ = 2176926808. Its totient is φ = 1865937240.

The previous prime is 2021432011. The next prime is 2021432041. The reversal of 2021432023 is 3202341202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021432023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021432053) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 77747373 + ... + 77747398.

It is an arithmetic number, because the mean of its divisors is an integer number (544231702).

Almost surely, 2^2021432023 is an apocalyptic number.

2021432023 is a deficient number, since it is larger than the sum of its proper divisors (155494785).

2021432023 is a wasteful number, since it uses less digits than its factorization.

2021432023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155494784.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2021432023 is about 44960.3383328017. The cubic root of 2021432023 is about 1264.4055121409.

Adding to 2021432023 its reverse (3202341202), we get a palindrome (5223773225).

The spelling of 2021432023 in words is "two billion, twenty-one million, four hundred thirty-two thousand, twenty-three".