2021434534 has 48 divisors (see below), whose sum is σ = 3716713728. Its totient is φ = 820523088.

The previous prime is 2021434517. The next prime is 2021434537. The reversal of 2021434534 is 4354341202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021434537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227809 + ... + 236515.

It is an arithmetic number, because the mean of its divisors is an integer number (77431536).

Almost surely, 2^2021434534 is an apocalyptic number.

2021434534 is a deficient number, since it is larger than the sum of its proper divisors (1695279194).

2021434534 is a wasteful number, since it uses less digits than its factorization.

2021434534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8849 (or 8842 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2021434534 is about 44960.3662574050. The cubic root of 2021434534 is about 1264.4060356841.

Adding to 2021434534 its reverse (4354341202), we get a palindrome (6375775736).

The spelling of 2021434534 in words is "two billion, twenty-one million, four hundred thirty-four thousand, five hundred thirty-four".