20415030442 has 4 divisors (see below), whose sum is σ = 30622545666. Its totient is φ = 10207515220.

The previous prime is 20415030421. The next prime is 20415030451. The reversal of 20415030442 is 24403051402.

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: 24403051402 = 2 ⋅12201525701.

It can be written as a sum of positive squares in only one way, i.e., 17924122161 + 2490908281 = 133881^2 + 49909^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103757609 + ... + 5103757612.

Almost surely, 2^20415030442 is an apocalyptic number.

20415030442 is a deficient number, since it is larger than the sum of its proper divisors (10207515224).

20415030442 is a wasteful number, since it uses less digits than its factorization.

20415030442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207515223.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20415030442 its reverse (24403051402), we get a palindrome (44818081844).

The spelling of 20415030442 in words is "twenty billion, four hundred fifteen million, thirty thousand, four hundred forty-two".