10820906397 has 88 divisors (see below), whose sum is σ = 18978713856. Its totient is φ = 6040948896.

The previous prime is 10820906377. The next prime is 10820906399. The reversal of 10820906397 is 79360902801.

10820906397 is a `hidden beast` number, since 1 + 0 + 8 + 2 + 0 + 9 + 0 + 639 + 7 = 666.

It is not a de Polignac number, because 10820906397 - 2¹⁰ = 10820905373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10820906399) by changing a digit.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 19426843 + ... + 19427399.

Almost surely, 2^10820906397 is an apocalyptic number.

It is an amenable number.

10820906397 is a deficient number, since it is larger than the sum of its proper divisors (8157807459).

10820906397 is an frugal number, since it uses more digits than its factorization.

10820906397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 10820906397 in words is "ten billion, eight hundred twenty million, nine hundred six thousand, three hundred ninety-seven".