20004709977 has 24 divisors (see below), whose sum is σ = 34459461504. Its totient is φ = 10934250624.

The previous prime is 20004709957. The next prime is 20004709981. The reversal of 20004709977 is 77990740002.

It is a happy number.

20004709977 is a `hidden beast` number, since 20 + 0 + 0 + 470 + 99 + 77 = 666.

It is not a de Polignac number, because 20004709977 - 2¹² = 20004705881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20004709957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6901488 + ... + 6904385.

It is an arithmetic number, because the mean of its divisors is an integer number (1435810896).

Almost surely, 2^20004709977 is an apocalyptic number.

It is an amenable number.

20004709977 is a deficient number, since it is larger than the sum of its proper divisors (14454751527).

20004709977 is a wasteful number, since it uses less digits than its factorization.

20004709977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13805909 (or 13805906 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The spelling of 20004709977 in words is "twenty billion, four million, seven hundred nine thousand, nine hundred seventy-seven".