20977411570 has 32 divisors (see below), whose sum is σ = 38400485760. Its totient is φ = 8249662080.

The previous prime is 20977411561. The next prime is 20977411577. The reversal of 20977411570 is 7511477902.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20977411577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69910 + ... + 216430.

It is an arithmetic number, because the mean of its divisors is an integer number (1200015180).

Almost surely, 2^20977411570 is an apocalyptic number.

20977411570 is a deficient number, since it is larger than the sum of its proper divisors (17423074190).

20977411570 is a wasteful number, since it uses less digits than its factorization.

20977411570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146770.

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 20977411570 in words is "twenty billion, nine hundred seventy-seven million, four hundred eleven thousand, five hundred seventy".