20246915378 has 4 divisors (see below), whose sum is σ = 30370373070. Its totient is φ = 10123457688.

The previous prime is 20246915327. The next prime is 20246915383. The reversal of 20246915378 is 87351964202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87351964202 = 2 ⋅43675982101.

It can be written as a sum of positive squares in only one way, i.e., 16627328809 + 3619586569 = 128947^2 + 60163^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061728843 + ... + 5061728846.

It is a 1-persistent number, because it is pandigital, but 2⋅20246915378 = 40493830756 is not.

Almost surely, 2^20246915378 is an apocalyptic number.

20246915378 is a deficient number, since it is larger than the sum of its proper divisors (10123457692).

20246915378 is a wasteful number, since it uses less digits than its factorization.

20246915378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10123457691.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20246915378 in words is "twenty billion, two hundred forty-six million, nine hundred fifteen thousand, three hundred seventy-eight".