13703921781 has 8 divisors (see below), whose sum is σ = 19932977184. Its totient is φ = 8305407120.

The previous prime is 13703921771. The next prime is 13703921807. The reversal of 13703921781 is 18712930731.

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

It is not a de Polignac number, because 13703921781 - 2¹³ = 13703913589 is a prime.

It is a super-2 number, since 2×13703921781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13703921711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207635146 + ... + 207635211.

It is an arithmetic number, because the mean of its divisors is an integer number (2491622148).

Almost surely, 2^13703921781 is an apocalyptic number.

13703921781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13703921781 is a deficient number, since it is larger than the sum of its proper divisors (6229055403).

13703921781 is a wasteful number, since it uses less digits than its factorization.

13703921781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415270371.

The product of its (nonzero) digits is 63504, while the sum is 42.

The spelling of 13703921781 in words is "thirteen billion, seven hundred three million, nine hundred twenty-one thousand, seven hundred eighty-one".