20525345401 has 4 divisors (see below), whose sum is σ = 22391285904. Its totient is φ = 18659404900.

The previous prime is 20525345387. The next prime is 20525345447. The reversal of 20525345401 is 10454352502.

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 a de Polignac number, because none of the positive numbers 2^k-20525345401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525340401) 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, 932970235 + ... + 932970256.

It is an arithmetic number, because the mean of its divisors is an integer number (5597821476).

Almost surely, 2^20525345401 is an apocalyptic number.

It is an amenable number.

20525345401 is a deficient number, since it is larger than the sum of its proper divisors (1865940503).

20525345401 is a wasteful number, since it uses less digits than its factorization.

20525345401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865940502.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20525345401 its reverse (10454352502), we get a palindrome (30979697903).

The spelling of 20525345401 in words is "twenty billion, five hundred twenty-five million, three hundred forty-five thousand, four hundred one".