17621113402 has 4 divisors (see below), whose sum is σ = 26431670106. Its totient is φ = 8810556700.

The previous prime is 17621113379. The next prime is 17621113417. The reversal of 17621113402 is 20431112671.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20431112671 = 379 ⋅53907949.

It can be written as a sum of positive squares in only one way, i.e., 15565307121 + 2055806281 = 124761^2 + 45341^2 .

It is a super-2 number, since 2×17621113402² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4405278349 + ... + 4405278352.

Almost surely, 2^17621113402 is an apocalyptic number.

17621113402 is a deficient number, since it is larger than the sum of its proper divisors (8810556704).

17621113402 is an equidigital number, since it uses as much as digits as its factorization.

17621113402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8810556703.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 17621113402 in words is "seventeen billion, six hundred twenty-one million, one hundred thirteen thousand, four hundred two".