74632000021 has 2 divisors, whose sum is σ = 74632000022. Its totient is φ = 74632000020.

The previous prime is 74631999973. The next prime is 74632000049. The reversal of 74632000021 is 12000023647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68664437521 + 5967562500 = 262039^2 + 77250^2 .

It is a cyclic number.

It is not a de Polignac number, because 74632000021 - 2¹³ = 74631991829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74632000021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74632000321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37316000010 + 37316000011.

It is an arithmetic number, because the mean of its divisors is an integer number (37316000011).

Almost surely, 2^74632000021 is an apocalyptic number.

It is an amenable number.

74632000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

74632000021 is an equidigital number, since it uses as much as digits as its factorization.

74632000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 74632000021 its reverse (12000023647), we get a palindrome (86632023668).

The spelling of 74632000021 in words is "seventy-four billion, six hundred thirty-two million, twenty-one", and thus it is an aban number.