20540730471 has 16 divisors (see below), whose sum is σ = 29015034624. Its totient is φ = 12881032064.

The previous prime is 20540730391. The next prime is 20540730487. The reversal of 20540730471 is 17403704502.

It is a cyclic number.

It is not a de Polignac number, because 20540730471 - 2⁹ = 20540729959 is a prime.

It is a super-3 number, since 3×20540730471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540730871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21555 + ... + 203828.

It is an arithmetic number, because the mean of its divisors is an integer number (1813439664).

Almost surely, 2^20540730471 is an apocalyptic number.

20540730471 is a deficient number, since it is larger than the sum of its proper divisors (8474304153).

20540730471 is a wasteful number, since it uses less digits than its factorization.

20540730471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227190.

The product of its (nonzero) digits is 23520, while the sum is 33.

The spelling of 20540730471 in words is "twenty billion, five hundred forty million, seven hundred thirty thousand, four hundred seventy-one".