20401619202 has 20 divisors (see below), whose sum is σ = 45714739686. Its totient is φ = 6800539680.

The previous prime is 20401619197. The next prime is 20401619207. The reversal of 20401619202 is 20291610402.

20401619202 is a `hidden beast` number, since 2 + 0 + 40 + 1 + 619 + 2 + 0 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20401619197) and next prime (20401619207).

It can be written as a sum of positive squares in only one way, i.e., 16238659761 + 4162959441 = 127431^2 + 64521^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20401619207) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 62967799 + ... + 62968122.

Almost surely, 2^20401619202 is an apocalyptic number.

20401619202 is an abundant number, since it is smaller than the sum of its proper divisors (25313120484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20401619202 is a wasteful number, since it uses less digits than its factorization.

20401619202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125935935 (or 125935926 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 20401619202 in words is "twenty billion, four hundred one million, six hundred nineteen thousand, two hundred two".