13969542394 has 16 divisors (see below), whose sum is σ = 21038852520. Its totient is φ = 6956615680.

The previous prime is 13969542341. The next prime is 13969542403. The reversal of 13969542394 is 49324596931.

It can be written as a sum of positive squares in 4 ways, for example, as 12522729025 + 1446813369 = 111905^2 + 38037^2 .

It is a super-2 number, since 2×13969542394² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1542672 + ... + 1551700.

Almost surely, 2^13969542394 is an apocalyptic number.

13969542394 is a deficient number, since it is larger than the sum of its proper divisors (7069310126).

13969542394 is a wasteful number, since it uses less digits than its factorization.

13969542394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12065.

The product of its digits is 6298560, while the sum is 55.

The spelling of 13969542394 in words is "thirteen billion, nine hundred sixty-nine million, five hundred forty-two thousand, three hundred ninety-four".