20587985229 has 16 divisors (see below), whose sum is σ = 31418122752. Its totient is φ = 11747329968.

The previous prime is 20587985227. The next prime is 20587985237. The reversal of 20587985229 is 92258978502.

It is not a de Polignac number, because 20587985229 - 2¹ = 20587985227 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587985227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703359 + ... + 732044.

It is an arithmetic number, because the mean of its divisors is an integer number (1963632672).

Almost surely, 2^20587985229 is an apocalyptic number.

It is an amenable number.

20587985229 is a deficient number, since it is larger than the sum of its proper divisors (10830137523).

20587985229 is a wasteful number, since it uses less digits than its factorization.

20587985229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436096.

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 20587985229 in words is "twenty billion, five hundred eighty-seven million, nine hundred eighty-five thousand, two hundred twenty-nine".