20520407019 has 32 divisors (see below), whose sum is σ = 31639887360. Its totient is φ = 11587099392.

The previous prime is 20520406993. The next prime is 20520407051. The reversal of 20520407019 is 91070402502.

It is not a de Polignac number, because 20520407019 - 2⁵ = 20520406987 is a prime.

It is a super-3 number, since 3×20520407019³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20520407069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5236849 + ... + 5240765.

It is an arithmetic number, because the mean of its divisors is an integer number (988746480).

Almost surely, 2^20520407019 is an apocalyptic number.

20520407019 is a deficient number, since it is larger than the sum of its proper divisors (11119480341).

20520407019 is a wasteful number, since it uses less digits than its factorization.

20520407019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6819.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 20520407019 in words is "twenty billion, five hundred twenty million, four hundred seven thousand, nineteen".