4021432400987 has 4 divisors (see below), whose sum is σ = 4037079998136. Its totient is φ = 4005784803840.

The previous prime is 4021432400927. The next prime is 4021432401011. The reversal of 4021432400987 is 7890042341204.

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

It is a cyclic number.

It is not a de Polignac number, because 4021432400987 - 2¹⁶ = 4021432335451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021432400917) 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 3 ways as a sum of consecutive naturals, for example, 7823798189 + ... + 7823798702.

It is an arithmetic number, because the mean of its divisors is an integer number (1009269999534).

Almost surely, 2^{4021432400987} is an apocalyptic number.

4021432400987 is a deficient number, since it is larger than the sum of its proper divisors (15647597149).

4021432400987 is a wasteful number, since it uses less digits than its factorization.

4021432400987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15647597148.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 4021432400987 in words is "four trillion, twenty-one billion, four hundred thirty-two million, four hundred thousand, nine hundred eighty-seven".