1920939514647 has 16 divisors (see below), whose sum is σ = 2594987965920. Its totient is φ = 1263833505792.

The previous prime is 1920939514619. The next prime is 1920939514649. The reversal of 1920939514647 is 7464159390291.

It is not a de Polignac number, because 1920939514647 - 2⁷ = 1920939514519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920939514649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9247372 + ... + 9452817.

It is an arithmetic number, because the mean of its divisors is an integer number (162186747870).

Almost surely, 2^{1920939514647} is an apocalyptic number.

1920939514647 is a deficient number, since it is larger than the sum of its proper divisors (674048451273).

1920939514647 is a wasteful number, since it uses less digits than its factorization.

1920939514647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18700642.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 1920939514647 in words is "one trillion, nine hundred twenty billion, nine hundred thirty-nine million, five hundred fourteen thousand, six hundred forty-seven".