20247402 has 32 divisors (see below), whose sum is σ = 47775744. Its totient is φ = 5598000.

The previous prime is 20247389. The next prime is 20247413. The reversal of 20247402 is 20474202.

20247402 is nontrivially palindromic in base 5.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6474 + ... + 9077.

It is an arithmetic number, because the mean of its divisors is an integer number (1492992).

Almost surely, 2^20247402 is an apocalyptic number.

20247402 is an abundant number, since it is smaller than the sum of its proper divisors (27528342).

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

20247402 is a wasteful number, since it uses less digits than its factorization.

20247402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15594.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 20247402 is about 4499.7113240740. The cubic root of 20247402 is about 272.5564319342.

The spelling of 20247402 in words is "twenty million, two hundred forty-seven thousand, four hundred two".