20624153146 has 4 divisors (see below), whose sum is σ = 30936229722. Its totient is φ = 10312076572.

The previous prime is 20624153113. The next prime is 20624153219. The reversal of 20624153146 is 64135142602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64135142602 = 2 ⋅32067571301.

It can be written as a sum of positive squares in only one way, i.e., 19205802225 + 1418350921 = 138585^2 + 37661^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5156038285 + ... + 5156038288.

Almost surely, 2^20624153146 is an apocalyptic number.

20624153146 is a deficient number, since it is larger than the sum of its proper divisors (10312076576).

20624153146 is a wasteful number, since it uses less digits than its factorization.

20624153146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10312076575.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20624153146 its reverse (64135142602), we get a palindrome (84759295748).

The spelling of 20624153146 in words is "twenty billion, six hundred twenty-four million, one hundred fifty-three thousand, one hundred forty-six".