20191402 has 16 divisors (see below), whose sum is σ = 37760832. Its totient is φ = 7866720.

The previous prime is 20191387. The next prime is 20191403. The reversal of 20191402 is 20419102.

It is a self number, because there is not a number n which added to its sum of digits gives 20191402.

It is not an unprimeable number, because it can be changed into a prime (20191403) 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, 65403 + ... + 65710.

It is an arithmetic number, because the mean of its divisors is an integer number (2360052).

Almost surely, 2^20191402 is an apocalyptic number.

20191402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20191402 is a deficient number, since it is larger than the sum of its proper divisors (17569430).

20191402 is a wasteful number, since it uses less digits than its factorization.

20191402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131133.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 20191402 is about 4493.4843940977. The cubic root of 20191402 is about 272.3049222442.

The spelling of 20191402 in words is "twenty million, one hundred ninety-one thousand, four hundred two".