20539784470 has 32 divisors (see below), whose sum is σ = 39280204800. Its totient is φ = 7718207616.

The previous prime is 20539784443. The next prime is 20539784537. The reversal of 20539784470 is 7448793502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946390 + ... + 967849.

It is an arithmetic number, because the mean of its divisors is an integer number (1227506400).

Almost surely, 2^20539784470 is an apocalyptic number.

20539784470 is a deficient number, since it is larger than the sum of its proper divisors (18740420330).

20539784470 is a wasteful number, since it uses less digits than its factorization.

20539784470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914312.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 20539784470 in words is "twenty billion, five hundred thirty-nine million, seven hundred eighty-four thousand, four hundred seventy".