20238401487 has 16 divisors (see below), whose sum is σ = 27043975008. Its totient is φ = 13462579200.

The previous prime is 20238401479. The next prime is 20238401531. The reversal of 20238401487 is 78410483202.

It is not a de Polignac number, because 20238401487 - 2³ = 20238401479 is a prime.

It is a super-2 number, since 2×20238401487² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238403487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3835483 + ... + 3840755.

It is an arithmetic number, because the mean of its divisors is an integer number (1690248438).

Almost surely, 2^20238401487 is an apocalyptic number.

20238401487 is a deficient number, since it is larger than the sum of its proper divisors (6805573521).

20238401487 is a wasteful number, since it uses less digits than its factorization.

20238401487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7850.

The product of its (nonzero) digits is 86016, while the sum is 39.

Adding to 20238401487 its reverse (78410483202), we get a palindrome (98648884689).

The spelling of 20238401487 in words is "twenty billion, two hundred thirty-eight million, four hundred one thousand, four hundred eighty-seven".