20576469999 has 8 divisors (see below), whose sum is σ = 27952940592. Its totient is φ = 13458823040.

The previous prime is 20576469997. The next prime is 20576470003. The reversal of 20576469999 is 99996467502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20576469999 - 2¹ = 20576469997 is a prime.

It is a super-2 number, since 2×20576469999² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20576469997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64705722 + ... + 64706039.

It is an arithmetic number, because the mean of its divisors is an integer number (3494117574).

Almost surely, 2^20576469999 is an apocalyptic number.

20576469999 is a deficient number, since it is larger than the sum of its proper divisors (7376470593).

20576469999 is a wasteful number, since it uses less digits than its factorization.

20576469999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129411817.

The product of its (nonzero) digits is 66134880, while the sum is 66.

The spelling of 20576469999 in words is "twenty billion, five hundred seventy-six million, four hundred sixty-nine thousand, nine hundred ninety-nine".