20653030157 has 4 divisors (see below), whose sum is σ = 20654305056. Its totient is φ = 20651755260.

The previous prime is 20653030141. The next prime is 20653030199. The reversal of 20653030157 is 75103035602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20653030157 - 2⁴ = 20653030141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20653030117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612833 + ... + 645654.

It is an arithmetic number, because the mean of its divisors is an integer number (5163576264).

Almost surely, 2^20653030157 is an apocalyptic number.

It is an amenable number.

20653030157 is a deficient number, since it is larger than the sum of its proper divisors (1274899).

20653030157 is a wasteful number, since it uses less digits than its factorization.

20653030157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274898.

The product of its (nonzero) digits is 18900, while the sum is 32.

Adding to 20653030157 its reverse (75103035602), we get a palindrome (95756065759).

Subtracting 20653030157 from its reverse (75103035602), we obtain a palindrome (54450005445).

The spelling of 20653030157 in words is "twenty billion, six hundred fifty-three million, thirty thousand, one hundred fifty-seven".