20977429426 has 8 divisors (see below), whose sum is σ = 31466761884. Its totient is φ = 10488508800.

The previous prime is 20977429411. The next prime is 20977429439. The reversal of 20977429426 is 62492477902.

It can be written as a sum of positive squares in 2 ways, for example, as 17902172401 + 3075257025 = 133799^2 + 55455^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128046 + ... + 241558.

Almost surely, 2^20977429426 is an apocalyptic number.

20977429426 is a deficient number, since it is larger than the sum of its proper divisors (10489332458).

20977429426 is a wasteful number, since it uses less digits than its factorization.

20977429426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205916.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 20977429426 in words is "twenty billion, nine hundred seventy-seven million, four hundred twenty-nine thousand, four hundred twenty-six".