4036004363021 has 4 divisors (see below), whose sum is σ = 4036280192892. Its totient is φ = 4035728533152.

The previous prime is 4036004363009. The next prime is 4036004363023. The reversal of 4036004363021 is 1203634006304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1524051975625 + 2511952387396 = 1234525^2 + 1584914^2 .

It is a cyclic number.

It is not a de Polignac number, because 4036004363021 - 2³⁸ = 3761126456077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4036004363023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137892986 + ... + 137922251.

It is an arithmetic number, because the mean of its divisors is an integer number (1009070048223).

Almost surely, 2^{4036004363021} is an apocalyptic number.

It is an amenable number.

4036004363021 is a deficient number, since it is larger than the sum of its proper divisors (275829871).

4036004363021 is a wasteful number, since it uses less digits than its factorization.

4036004363021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275829870.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 4036004363021 its reverse (1203634006304), we get a palindrome (5239638369325).

The spelling of 4036004363021 in words is "four trillion, thirty-six billion, four million, three hundred sixty-three thousand, twenty-one".