20841402 has 16 divisors (see below), whose sum is σ = 42469920. Its totient is φ = 6815952.

The previous prime is 20841391. The next prime is 20841409. The reversal of 20841402 is 20414802.

It is not an unprimeable number, because it can be changed into a prime (20841409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32452 + ... + 33087.

It is an arithmetic number, because the mean of its divisors is an integer number (2654370).

Almost surely, 2^20841402 is an apocalyptic number.

20841402 is an abundant number, since it is smaller than the sum of its proper divisors (21628518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20841402 is a wasteful number, since it uses less digits than its factorization.

20841402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65597.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 20841402 is about 4565.2384384608. The cubic root of 20841402 is about 275.1961223567.

It can be divided in two parts, 2084 and 1402, that added together give a triangular number (3486 = T₈₃).

The spelling of 20841402 in words is "twenty million, eight hundred forty-one thousand, four hundred two".