20770998369 has 32 divisors (see below), whose sum is σ = 30331445760. Its totient is φ = 12538982400.

The previous prime is 20770998343. The next prime is 20770998371. The reversal of 20770998369 is 96389907702.

It is not a de Polignac number, because 20770998369 - 2²³ = 20762609761 is a prime.

It is a super-2 number, since 2×20770998369² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20770998389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12459274 + ... + 12460940.

It is an arithmetic number, because the mean of its divisors is an integer number (947857680).

Almost surely, 2^20770998369 is an apocalyptic number.

It is an amenable number.

20770998369 is a deficient number, since it is larger than the sum of its proper divisors (9560447391).

20770998369 is a wasteful number, since it uses less digits than its factorization.

20770998369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941.

The product of its (nonzero) digits is 10287648, while the sum is 60.

The spelling of 20770998369 in words is "twenty billion, seven hundred seventy million, nine hundred ninety-eight thousand, three hundred sixty-nine".