20642413 has 8 divisors (see below), whose sum is σ = 22554720. Its totient is φ = 18736080.

The previous prime is 20642371. The next prime is 20642423. The reversal of 20642413 is 31424602.

It is a happy number.

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

It is not a de Polignac number, because 20642413 - 2¹³ = 20634221 is a prime.

It is a super-2 number, since 2×20642413² = 852218428925138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642423) 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, 8943 + ... + 11011.

It is an arithmetic number, because the mean of its divisors is an integer number (2819340).

Almost surely, 2^20642413 is an apocalyptic number.

It is an amenable number.

20642413 is a deficient number, since it is larger than the sum of its proper divisors (1912307).

20642413 is a wasteful number, since it uses less digits than its factorization.

20642413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20642413 is about 4543.3922348835. The cubic root of 20642413 is about 274.3174832348.

The spelling of 20642413 in words is "twenty million, six hundred forty-two thousand, four hundred thirteen".