20870485475 has 36 divisors (see below), whose sum is σ = 30918315744. Its totient is φ = 13924370880.

The previous prime is 20870485423. The next prime is 20870485481. The reversal of 20870485475 is 57458407802.

It is not a de Polignac number, because 20870485475 - 2⁶ = 20870485411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 184907 + ... + 275556.

It is an arithmetic number, because the mean of its divisors is an integer number (858842104).

Almost surely, 2^20870485475 is an apocalyptic number.

20870485475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20870485475 is a deficient number, since it is larger than the sum of its proper divisors (10047830269).

20870485475 is a wasteful number, since it uses less digits than its factorization.

20870485475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460524 (or 460512 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 50.

The spelling of 20870485475 in words is "twenty billion, eight hundred seventy million, four hundred eighty-five thousand, four hundred seventy-five".