20406277485 has 64 divisors (see below), whose sum is σ = 40541195520. Its totient is φ = 9652608000.

The previous prime is 20406277483. The next prime is 20406277487. The reversal of 20406277485 is 58477260402.

It is a happy number.

20406277485 is a `hidden beast` number, since 2 + 0 + 40 + 62 + 77 + 485 = 666.

It is an interprime number because it is at equal distance from previous prime (20406277483) and next prime (20406277487).

It is not a de Polignac number, because 20406277485 - 2¹ = 20406277483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20406277485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20406277483) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106696 + ... + 228465.

It is an arithmetic number, because the mean of its divisors is an integer number (633456180).

Almost surely, 2^20406277485 is an apocalyptic number.

It is an amenable number.

20406277485 is a deficient number, since it is larger than the sum of its proper divisors (20134918035).

20406277485 is a wasteful number, since it uses less digits than its factorization.

20406277485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335227 (or 335221 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 20406277485 in words is "twenty billion, four hundred six million, two hundred seventy-seven thousand, four hundred eighty-five".