2021354154 has 24 divisors (see below), whose sum is σ = 4386134532. Its totient is φ = 672779520.

The previous prime is 2021354147. The next prime is 2021354173. The reversal of 2021354154 is 4514531202.

It can be written as a sum of positive squares in 2 ways, for example, as 1946133225 + 75220929 = 44115^2 + 8673^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71317 + ... + 95544.

Almost surely, 2^2021354154 is an apocalyptic number.

2021354154 is an abundant number, since it is smaller than the sum of its proper divisors (2364780378).

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

2021354154 is a wasteful number, since it uses less digits than its factorization.

2021354154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167542 (or 167539 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2021354154 is about 44959.4723501066. The cubic root of 2021354154 is about 1264.3892762487.

Adding to 2021354154 its reverse (4514531202), we get a palindrome (6535885356).

The spelling of 2021354154 in words is "two billion, twenty-one million, three hundred fifty-four thousand, one hundred fifty-four".