20471472495 has 32 divisors (see below), whose sum is σ = 36535400640. Its totient is φ = 10875617280.

The previous prime is 20471472481. The next prime is 20471472509. The reversal of 20471472495 is 59427417402.

20471472495 is a `hidden beast` number, since 20 + 4 + 71 + 4 + 72 + 495 = 666.

It is an interprime number because it is at equal distance from previous prime (20471472481) and next prime (20471472509).

It is not a de Polignac number, because 20471472495 - 2⁸ = 20471472239 is a prime.

It is a super-2 number, since 2×20471472495² (a number of 21 digits) contains 22 as substring.

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 20471472495.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 260326 + ... + 329715.

It is an arithmetic number, because the mean of its divisors is an integer number (1141731270).

Almost surely, 2^20471472495 is an apocalyptic number.

20471472495 is a deficient number, since it is larger than the sum of its proper divisors (16063928145).

20471472495 is a wasteful number, since it uses less digits than its factorization.

20471472495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590312 (or 590306 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

Adding to 20471472495 its reverse (59427417402), we get a palindrome (79898889897).

The spelling of 20471472495 in words is "twenty billion, four hundred seventy-one million, four hundred seventy-two thousand, four hundred ninety-five".