20185929465 has 64 divisors (see below), whose sum is σ = 35943677952. Its totient is φ = 9606470400.

The previous prime is 20185929419. The next prime is 20185929481. The reversal of 20185929465 is 56492958102.

It is not a de Polignac number, because 20185929465 - 2⁸ = 20185929209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9471450 + ... + 9473580.

It is an arithmetic number, because the mean of its divisors is an integer number (561619968).

Almost surely, 2^20185929465 is an apocalyptic number.

It is an amenable number.

20185929465 is a deficient number, since it is larger than the sum of its proper divisors (15757748487).

20185929465 is a wasteful number, since it uses less digits than its factorization.

20185929465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 20185929465 in words is "twenty billion, one hundred eighty-five million, nine hundred twenty-nine thousand, four hundred sixty-five".