2021234478 has 32 divisors (see below), whose sum is σ = 4268730240. Its totient is φ = 636259680.

The previous prime is 2021234471. The next prime is 2021234507. The reversal of 2021234478 is 8744321202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021234471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8173 + ... + 64103.

It is an arithmetic number, because the mean of its divisors is an integer number (133397820).

Almost surely, 2^2021234478 is an apocalyptic number.

2021234478 is an abundant number, since it is smaller than the sum of its proper divisors (2247495762).

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

2021234478 is a wasteful number, since it uses less digits than its factorization.

2021234478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56272.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 2021234478 is about 44958.1413984164. The cubic root of 2021234478 is about 1264.3643226737.

The spelling of 2021234478 in words is "two billion, twenty-one million, two hundred thirty-four thousand, four hundred seventy-eight".