20624602 has 4 divisors (see below), whose sum is σ = 30936906. Its totient is φ = 10312300.

The previous prime is 20624581. The next prime is 20624603. The reversal of 20624602 is 20642602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20642602 = 2 ⋅10321301.

It can be written as a sum of positive squares in only one way, i.e., 16818201 + 3806401 = 4101^2 + 1951^2 .

It is not an unprimeable number, because it can be changed into a prime (20624603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5156149 + ... + 5156152.

Almost surely, 2^20624602 is an apocalyptic number.

20624602 is a deficient number, since it is larger than the sum of its proper divisors (10312304).

20624602 is a wasteful number, since it uses less digits than its factorization.

20624602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10312303.

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

The square root of 20624602 is about 4541.4317125770. The cubic root of 20624602 is about 274.2385636079.

The spelling of 20624602 in words is "twenty million, six hundred twenty-four thousand, six hundred two".