2021556342 has 32 divisors (see below), whose sum is σ = 4543435008. Its totient is φ = 594972576.

The previous prime is 2021556337. The next prime is 2021556349. The reversal of 2021556342 is 2436551202.

2021556342 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021556349) 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, 561628 + ... + 565215.

It is an arithmetic number, because the mean of its divisors is an integer number (141982344).

Almost surely, 2^2021556342 is an apocalyptic number.

2021556342 is an abundant number, since it is smaller than the sum of its proper divisors (2521878666).

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

2021556342 is a wasteful number, since it uses less digits than its factorization.

2021556342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126884.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 2021556342 is about 44961.7208522983. The cubic root of 2021556342 is about 1264.4314321166.

The spelling of 2021556342 in words is "two billion, twenty-one million, five hundred fifty-six thousand, three hundred forty-two".