4020154521 has 16 divisors (see below), whose sum is σ = 5607899136. Its totient is φ = 2556866576.

The previous prime is 4020154517. The next prime is 4020154559. The reversal of 4020154521 is 1254510204.

It is not a de Polignac number, because 4020154521 - 2² = 4020154517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4020154491 and 4020154500.

It is not an unprimeable number, because it can be changed into a prime (4020154561) 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 15 ways as a sum of consecutive naturals, for example, 49635 + ... + 102488.

It is an arithmetic number, because the mean of its divisors is an integer number (350493696).

Almost surely, 2^4020154521 is an apocalyptic number.

It is an amenable number.

4020154521 is a deficient number, since it is larger than the sum of its proper divisors (1587744615).

4020154521 is a wasteful number, since it uses less digits than its factorization.

4020154521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152532.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 4020154521 is about 63404.6884780613. The cubic root of 4020154521 is about 1590.0626956015.

Adding to 4020154521 its reverse (1254510204), we get a palindrome (5274664725).

The spelling of 4020154521 in words is "four billion, twenty million, one hundred fifty-four thousand, five hundred twenty-one".