20387037401 has 4 divisors (see below), whose sum is σ = 20460637092. Its totient is φ = 20313437712.

The previous prime is 20387037397. The next prime is 20387037409. The reversal of 20387037401 is 10473078302.

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 10362222025 + 10024815376 = 101795^2 + 100124^2 .

It is a cyclic number.

It is not a de Polignac number, because 20387037401 - 2² = 20387037397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20387037409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36799430 + ... + 36799983.

It is an arithmetic number, because the mean of its divisors is an integer number (5115159273).

Almost surely, 2^20387037401 is an apocalyptic number.

It is an amenable number.

20387037401 is a deficient number, since it is larger than the sum of its proper divisors (73599691).

20387037401 is an equidigital number, since it uses as much as digits as its factorization.

20387037401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73599690.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 20387037401 in words is "twenty billion, three hundred eighty-seven million, thirty-seven thousand, four hundred one".